MESON Chess Problem Database

Problem Display
PID: 233423 (8/7Q/3Pp3/2KnNp2/2N1kPR1/2p1p3/2P1R1n1/8 w - - 0 1)

Gamza, Grigory Stepanovich

Freie Presse, 1992

8/7Q/3Pp3/2KnNp2/2N1kPR1/2p1p3/2P1R1n1/8

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sgxf4
      • 2.Qh1#
    • 1...Sdxf4
      • 2.Qb7#
  • Tries
    • 1.Qb7?
      • 1...Sxf4
        • 2.Rxe3#
      • 1...Se1
        • 2.Rxe3#
      • 1...Sh4
        • 2.Rxe3#
      • 1...fxg4!
    • 1.d7?
      • threat
        • 2.Sd6#
      • 1...Sgxf4
        • 2.Qh1#
      • 1...Sdxf4!
  • Keys
    • 1.Sxe3!
      • 1...Sgxe3
        • 2.Qh1#
      • 1...Sgxf4
        • 2.Sxd5#
      • 1...Sdxe3
        • 2.Qb7#
      • 1...Sdxf4
        • 2.Sxg2#
      • 1...Se1
        • 2.Sxd5#
      • 1...Sh4
        • 2.Sxd5#
      • 1...Sb4
        • 2.Sxg2#
      • 1...Sb6
        • 2.Sxg2#
      • 1...Sf6
        • 2.Sxg2#
      • 1...Sc7
        • 2.Sxg2#
      • 1...Se7
        • 2.Sxg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATEB,P_SPINS(a),XP(D)::QAB(I)
    • S(e);OGATEB,P_SPINS(e),XP(D)::QAB(I)
  • Tries
    • Try
      • Q(I);P_PINS(e)
      • Vars
        • S(a);N_GUARD,N_SPINS(e),P_SPINS(a),XP(D)::R1(B),XP(c)
        • S(a);N_GUARD::R1(B),XP(c)
      • Refutation
        • P(f);XR(E)
    • Try
      • P(H);
      • Threat
        • S(C)
      • Vars
        • S(a);OGATEB,P_SPINS(a),XP(D)::QAB(I)
      • Refutation
        • S(e);P_SPINS(e),XP(D)
  • Actual
    • S(C);P_PINP(f),XP(c)
    • Vars
      • S(a);OGATEB,P_SPINS(a),XS(C)::QAB(I)
      • S(a);N_GUARD,P_SPINS(a),XP(D)::R(B)+S(C),XS(e)
      • S(e);OGATEB,P_SPINS(e),XS(C)::QAB(I)
      • S(e);N_GUARD,P_SPINS(e),XP(D)::R(B)+S(C),XS(a)
      • S(a);N_GUARD::R(B)+S(C),XS(e)
      • S(e);N_GUARD::R(B)+S(C),XS(a)
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