MESON Chess Problem Database

Problem Display
PID: 142916 (1b3RK1/1N2BB2/P1p5/Q3PkpP/R7/1P2p2P/4N2q/7b w - - 0 1)

Francey, James

Politiken, 1934

(First published on Sun Apr 1 1934)

1b3RK1/1N2BB2/P1p5/Q3PkpP/R7/1P2p2P/4N2q/7b

#2

13 + 7

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sxg3#
    • 1...Qxe5
      • 2.Sg3#
    • 1...Be4
      • 2.Bc4#
    • 1...Bxe5
      • 2.Sd6#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Ba7
      • 2.Sd6#
    • 1...g4
      • 2.hxg4#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Bg6#
      • 1...Kf4!
    • 1.Bd6?
      • threat
        • 2.Bd5#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Bd5
        • 2.Bxd5#
      • 1...g4!
  • Keys
    • 1.Re4!
      • threat
        • 2.Bd5#
      • 1...Kxe4
        • 2.Bg6#
      • 1...Qxe5
        • 2.Sg3#
      • 1...Bxe4
        • 2.Bc4#
      • 1...Bxe5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::S(A),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XP(F)::S(A)
    • B(a);SBLOCK::R(L)+B(K)
    • B(g);N_GUARD,P_SPINB(g),XP(F)::S(I)
    • B(g);N_GUARD::S(I),XB(g)
    • B(g);N_GUARD::S(I)
    • P(e);OGATE::P(C),XP(e)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);S_FLIGHT::B(K)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(J);
      • Threat
        • R(L)+B(K)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XP(F)::QAR1(E),XQ(b)
        • B(g);XB(J)::S(I),XB(g)
        • B(a);P_PINB(K)::R(L)+B(K),XB(a)
      • Refutation
        • P(e);
  • Actual
    • R(D);
    • Threat
      • R(L)+B(K)
    • Vars
      • K(d);S_FLIGHT,XR(D)::B(K)
      • Q(b);N_GUARD,P_SPINQ(b),XP(F)::S(A)
      • B(a);SBLOCK,XR(D)::R(L)+B(K)
      • B(g);N_GUARD,P_SPINB(g),XP(F)::S(I)
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