MESON Chess Problem Database

Problem Display
PID: 727 (1K1R4/5b2/BN1n4/1n1N2p1/4P2p/2Pk2bR/P1pP2Q1/1qr3B1 w - - 0 1)

Gamage, Frederick

Hassberg, Eric Manfred

HM., British Chess Magazine, 1944

1K1R4/5b2/BN1n4/1n1N2p1/4P2p/2Pk2bR/P1pP2Q1/1qr3B1

#2

12 + 10

5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa2
      • 2.Sb4#
    • 1...Qa1
      • 2.Sb4#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Sc4+
      • 2.Sf4#
    • 1...Sxe4+
      • 2.Sf4#
    • 1...Sf5+
      • 2.Sf4#
    • 1...Sb7+
      • 2.Sf4#
    • 1...Sc8+
      • 2.Sf4#
    • 1...Se8+
      • 2.Sf4#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Se5#
      • 1...Kc4
        • 2.Qe2#
      • 1...Sc4+!
    • 1.Bxb5+?
      • 1...Sc4+
        • 2.Sf4#
      • 1...Sxb5+
        • 2.Sf4#
      • 1...Qxb5!
    • 1.Rxd6?
      • threat
        • 2.Sb4#
        • 2.Sf4#
      • 1...Qb4
        • 2.Sxb4#
        • 2.Sf4#
      • 1...Bxd5!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se5#
      • 1...Sa3+
        • 2.Sb2#
      • 1...Sxc3+
        • 2.Sb2#
      • 1...Sd4+
        • 2.Sb2#
      • 1...Sa7+
        • 2.Sb2#
      • 1...Sc7+
        • 2.Sb2#
      • 1...Sxc4+
        • 2.Sf4#
      • 1...Kxc4
        • 2.Qe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD,XP(B)::S(H)
    • Q(a);N_GUARD::S(H)
    • Q(a);N_GUARD::S(H),XQ(a)
    • S(i);CHECK,N_SPINS(g)::R(L)+S(H),DCHECK
    • S(i);CHECK,XP(G)::R(L)+S(H),DCHECK
    • S(i);CHECK::R(L)+S(H),DCHECK
    • P(h);N_GUARD::S(H)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • K(d);N_SPINB(e),S_FLIGHT::QAB(D)
      • Refutation
        • S(i);CHECK,N_SPINS(g)
    • Try
      • B(I);CHECK,XS(g)
      • Vars
        • S(i);CHECK,P_SPINS(i)::R(L)+S(H),DCHECK
        • S(i);CHECK,XB(I)::R(L)+S(H),DCHECK
      • Refutation
        • Q(a);P_PINS(J),XB(I)
    • Try
      • R(L);P_SPINR(L),XS(i)
      • Threat
        • DUALS(2)
      • Refutation
        • B(j);XS(H)
  • Actual
    • S(J);N_PINS(g)
    • Threat
      • S(J)
    • Vars
      • S(g);CHECK::B(I)+S(J),DCHECK
      • S(g);CHECK,XP(E)::B(I)+S(J),DCHECK
      • S(i);CHECK,SBLOCK,XS(J)::R(L)+S(H),DCHECK
      • K(d);N_SPINB(e),P_SPINS(g),S_FLIGHT,XS(J)::QAB(D)
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