Panzergruppe Guderian is a board wargame designed by James F. Dunnigan and published by Simulations Publications, Inc. in 1976. It simulates the 1941 World War II Battle of Smolensk, between the German Wehrmacht and the Soviet Red Army, on an operational level. The game pieces mostly represent German regiments and Soviet divisions. It is played on a hexagonal grid board, where each hexagon represents 10.5 kilometers and each of the 12 turns spans two days.
The game follows the most common wargame structure. The Soviet player moves his units first, then conducts attacks, then the German moves, attacks then moves his mechanized forces a second time.
What distinguishes this game is the method in which the untried Soviet army is simulated. While German units have standardized combat strengths, their Soviet counterparts vary widely in quality. To incorporate this factor, Soviet units are initially picked randomly and deployed face down; their type (e.g. infantry, armor) and movement values are shown, but not their strengths. When a unit first enters combat, it is flipped over, revealing its offensive and defensive capabilities. There are even a few "phantom" units, with zero attack and defense values; until they are committed to battle, they are treated as normal units, but once revealed, they are immediately removed from the game.
The German forces are spearheaded by panzer (consisting of a tank and two panzergrenadier regiments, shown as separate counters) and motorized infantry (consisting of two - three in the case of the single SS division - motorized infantry regiments, also shown as separate counters) divisions. These divisions are doubled in strength ("divisional integrity") if all the regiments are stacked together, making a panzer division (16 strength points) almost twice as strong as an infantry division (9 strength points). German mechanized forces may move both before and after combat, conducting overruns (half-strength attacks) in each movement phase, giving them fearsome attack and movement potential - although they must stop moving after an unfavorable overrun result, are easily pinned down by Soviet zones of control, can only claim divisional integrity if all the regiments start moving from the same hex (i.e. not if the Soviet player has scattered them as they retreat after a previous unsuccessful attack) and as they outpace the slow-moving German infantry will inevitably take casualties.
The German forces trace supply to the road leading off the west map edge. The Soviet forces must trace supply to supplied army headquarters, each of the latter also having the ability to augment attacks in line with the army commander's abilities (eg. Rokossovsky rates a "5", but many others only "2"). Two army headquarters (only) may be airlifted out of German pockets in the course of the game. A Soviet "army", consisting typically of around five to ten divisions, was approximately the size of a German corps.
Some Soviet armies begin the game on the map, and others enter at intervals throughout the game, most of them from the East. The Soviet player also has the option to bring on divisions from the southern map edge to protect the city of Roslavl, south of Smolensk, but must pay a victory point penalty according to how many he brings on. All German forces enter the map on the western map edge.
The game also contains rudimentary rules for air interdiction. The German player receives three air interdiction markers, which slow the movement of Soviet reinforcements but which may not be placed far east of Smolensk until it is captured. The Soviet player receives a single interdiction marker for three turns late in the game - representing partisan activity as much as the then weak Red Air Force - which if placed on the road leading off the west map edge can severely disrupt German supply.
The German side receives victory points for capturing certain geographical objectives. The Soviet gains points for destroying entire German divisions and for recapturing locations taken by the Germans.
The game was reprinted by Avalon Hill in the mid-1980s, and is due to be reprinted by the L2 Design Group in 2008.