MESON Chess Problem Database

Problem Display
PID: 7816 (1B3K2/pP1k2p1/1p2N3/3N4/1P3P2/1p3pp1/B1R1R1Q1/7b w - - 0 1)

Gamza, Grigory Stepanovich

3rd Prize, US Problem Bulletin, 1993

1B3K2/pP1k2p1/1p2N3/3N4/1P3P2/1p3pp1/B1R1R1Q1/7b

#2

11 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...a5
      • 2.Sxb6#
    • 1...a6
      • 2.Sxb6#
    • 1...g5
      • 2.Sf6#
    • 1...g6
      • 2.Sf6#
  • Tries
    • 1.Sdc7?
      • threat
        • 2.Red2#
      • 1...Kd6
        • 2.Red2#
      • 1...fxe2
        • 2.Rd2#
      • 1...bxc2!
    • 1.Se7?
      • threat
        • 2.Rcd2#
      • 1...bxc2
        • 2.Rd2#
      • 1...fxe2!
    • 1.Rcd2?
      • threat
        • 2.Se7#
      • 1...fxe2
        • 2.Sdc7#
      • 1...Kc6!
  • Keys
    • 1.Red2!
      • threat
        • 2.Sdc7#
      • 1...Kxe6
        • 2.Qh3#
      • 1...bxc2
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • P(f);N_GUARD::S(G),XP(e)
    • P(h);N_GUARD::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(C)
      • Vars
        • K(g);P-FLIGHT::R(C)
        • P(c);XR(C)::R(B)
      • Refutation
        • P(b);XR(B)
    • Try
      • S(G);
      • Threat
        • R(B)
      • Vars
        • P(b);XR(B)::R(C)
      • Refutation
        • P(c);XR(C)
    • Try
      • R(B);
      • Threat
        • R(B)+S(G)
      • Vars
        • P(c);XR(C)::R(B)+S(G)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • R(C);
    • Threat
      • R(C)+S(G)
    • Vars
      • K(g);OGATEB,S_FLIGHT,XS(H)::QAB(D)
      • P(b);XR(B)::R(C)+S(G)
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