MESON Chess Problem Database

Problem Display
PID: 97462 (4K3/p2N2N1/r2pQ2p/n1Pp1p1r/2PkqR2/3P3b/2PP4/8 w - - 0 1)

Bakcsi, Gyorgy

US Problem Bulletin, 1991

4K3/p2N2N1/r2pQ2p/n1Pp1p1r/2PkqR2/3P3b/2PP4/8

#2

10 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxd5#
    • 1...dxc5
      • 2.Qe5#
  • Tries
    • 1.Rxe4+?
      • 1...dxe4
        • 2.Qd5#
        • 2.Qf6#
      • 1...fxe4!
    • 1.Qxe4+?
      • 1...dxe4
        • 2.Se6#
      • 1...fxe4!
    • 1.Qe7?
      • threat
        • 2.Se6#
      • 1...dxc5
        • 2.Qe5#
      • 1...dxc4!
  • Keys
    • 1.Rf3!
      • threat
        • 2.c3#
      • 1...Qxe6+
        • 2.Sxe6#
      • 1...Qxd3
        • 2.Qxd5#
      • 1...Qxf3
        • 2.Qf6#
      • 1...Qe3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_PINQ(G),N_SPINQ(c),XR(E)::QAR1(G),XP(e)
    • P(i);N_GUARD,XP(F)::QAB1(G)
  • Tries
    • Try
      • R(E);CHECK,N_SPINQ(G),XQ(c)
      • Refutation
        • P(f);XR(E)
    • Try
      • Q(G);CHECK,N_SPINQ(G),XQ(c)
      • Vars
        • P(e);P_SPINP(e),XQ(G)::S(I)
      • Refutation
        • P(f);P_SPINP(f),XQ(G)
    • Try
      • Q(G);
      • Threat
        • S(I)
      • Vars
        • P(i);N_GUARD,XP(F)::QAB1(G)
      • Refutation
        • P(e);XP(D)
  • Actual
    • R(E);N_PINQ(c)
    • Threat
      • P(A)
    • Vars
      • Q(c);CHECK,XQ(G)::S(I),XQ(c)
      • Q(c);N_PINQ(G),XP(C)::QAR1(G),XP(e)
      • Q(c);N_PINQ(G),XR(E)::QAB(G)
      • Q(c);::QAB1(G),XQ(c)
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