MESON Chess Problem Database

Problem Display
PID: 49072 (8/2p5/1pP5/1Q6/p4p2/k1p2p1R/P3PP2/R3K3 w Q - 0 1)

Gruber, Bratoljub

Problem (Zagreb), 1955

8/2p5/1pP5/1Q6/p4p2/k1p2p1R/P3PP2/R3K3

#2

8 + 7

273 Mat Plus 1995

SOLUTION

  • SOUND
  • Sets
    • 1...c2
      • 2.Rxf3#
    • 1...fxe2
      • 2.Rxc3#
  • Tries
    • 1.Kf1?
      • 1...c2
        • 2.Rxf3#
      • 1...fxe2+!
    • 1.Rb1?
      • 1...fxe2
        • 2.Qb2#
      • 1...c2
        • 2.Qb2#
      • 1...Kxa2!
    • 1.Rg3?
      • 1...fxe2
        • 2.Rxc3#
      • 1...c2
        • 2.Rxf3#
      • 1...fxg3!
    • 1.Qc4?
      • threat
        • 2.Qxc3#
      • 1...c2
        • 2.Qc3#
      • 1...Kb2!
    • 1.Qb1?
      • 1...fxe2
        • 2.Rxc3#
      • 1...c2
        • 2.Rxf3#
      • 1...b5!
    • 1.Qxb6?
      • 1...fxe2
        • 2.Rxc3#
      • 1...c2
        • 2.Rxf3#
      • 1...cxb6!
    • 1.e4?
      • 1...c2
        • 2.Rxf3#
      • 1...fxe4 ep!
  • Keys
    • 1.0-0-0!
      • 1...Kxa2
        • 2.Qxa4#
      • 1...fxe2
        • 2.Qb2#
      • 1...c2
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
    • P(c);OGATE,P_SPINP(b),XP(D)::R(F),XP(b)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
      • Refutation
        • P(c);CHECK,P_SPINP(b),XP(D)
    • Try
      • R(A);
      • Vars
        • P(c);P_SPINP(b),XP(D)::QAB1(G)
        • P(b);N_GUARD,P_SPINP(c)::QAB1(G)
      • Refutation
        • K(a);P-FLIGHT,XP(C)
    • Try
      • R(F);
      • Vars
        • P(c);OGATE,P_SPINP(b),XP(D)::R(F),XP(b)
        • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(G);
      • Threat
        • QAR2(G),XP(b)
      • Vars
        • P(b);P_SPINP(c)::QAR2(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • P(c);OGATE,P_SPINP(b),XP(D)::R(F),XP(b)
        • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
      • Refutation
        • P(f);
    • Try
      • Q(G);XP(f)
      • Vars
        • P(c);OGATE,P_SPINP(b),XP(D)::R(F),XP(b)
        • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
      • Refutation
        • P(g);XQ(G)
    • Try
      • P(D);
      • Vars
        • P(b);OGATEB,P_SPINP(c)::R(F),XP(c)
      • Refutation
        • P(e);EP,XP(D)
  • Actual
    • K(B);0-0-0
    • Vars
      • K(a);P-FLIGHT,XP(C)::QAR2(G),XP(d)
      • P(c);P_SPINP(b),XP(D)::QAB1(G)
      • P(b);N_GUARD,P_SPINP(c)::QAB1(G)
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