MESON Chess Problem Database

Problem Display
PID: 75065 (2Q3K1/1n1r1Nn1/qp4p1/p3P2p/R1b3k1/4RNPp/2B4P/2b5 w - - 0 1)

Gamage, Frederick

Chess Problem, 1945

2Q3K1/1n1r1Nn1/qp4p1/p3P2p/R1b3k1/4RNPp/2B4P/2b5

#2

10 + 12

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.Rxc4#
    • 1...Qa8
      • 2.Rxc4#
    • 1...Se6
      • 2.Sh6#
    • 1...Se8
      • 2.Qxd7#
  • Tries
    • 1.Re4+?
      • 1...Kf5
        • 2.Sd4#
      • 1...Bf4
        • 2.Rxf4#
      • 1...Kxf3!
    • 1.Qxd7+?
      • 1...Se6
        • 2.Sh6#
        • 2.Qxe6#
      • 1...Sf5!
    • 1.Qxc4+?
      • 1...Rd4
        • 2.Sh6#
        • 2.Qxd4#
      • 1...Qxc4!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Sh4#
      • 1...Kf5
        • 2.Sd4#
      • 1...h4
        • 2.Sxh4#
      • 1...Sf5
        • 2.Sd2#
      • 1...Se6
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD::R(F),XB(c)
    • Q(g);N_GUARD,P_PINQ(I)::R(F),XB(c)
    • S(l);N_PINS(H),N_SPINR(k)::S(H)
    • S(l);N_GUARD::QAB(I),XR(k)
  • Tries
    • Try
      • R(C);CHECK,N_PINB(c)
      • Vars
        • K(d);S_FLIGHT::S(D)
        • B(a);N_GUARD,P_SPINB(a)::R1(C),XB(a)
      • Refutation
        • K(d);N_SPINR(k),S_FLIGHT,XS(D)
    • Try
      • Q(I);CHECK,XR(k)
      • Refutation
        • S(l);P_SPINS(l)
    • Try
      • Q(I);CHECK,N_PINR(k),N_SPINS(H),XB(c)
      • Refutation
        • Q(g);P_PINS(H),P_SPINQ(g),XQ(I)
  • Actual
    • B(A);
    • Threat
      • B(A)+S(D)
    • Vars
      • K(d);N_SPINB(c),S_FLIGHT::S(D)
      • P(f);::B(A)+S(D),XP(f)
      • S(l);N_SPINR(k),SBLOCK::B(A)+S(D)
      • S(l);N_PINS(H),N_SPINR(k)::S(H)
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