MESON Chess Problem Database

Problem Display
PID: 42735 (8/7p/2BQP2n/r2NN2K/1r2k1pR/3p2B1/2bpq1p1/4R3 w - - 0 1)

Wallis, Walter Warren

Recomm., BCF 037. Ty., 1940-1941

8/7p/2BQP2n/r2NN2K/1r2k1pR/3p2B1/2bpq1p1/4R3

#2

9 + 11

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxb4#
    • 1...Sf5
      • 2.Rxg4#
  • Tries
    • 1.Qf8?
      • threat
        • 2.Qf4#
      • 1...Kd4
        • 2.Qxb4#
      • 1...Sf5
        • 2.Rxg4#
      • 1...Sf7!
  • Keys
    • 1.Sxg4!
      • threat
        • 2.Qf4#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Kf3
        • 2.Sh2#
      • 1...Kd4
        • 2.Qxb4#
      • 1...Kf5
        • 2.Se7#

This anticipates 107319(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(g);N_SPINQ(c),P-FLIGHT::QAR2(H),XR(f)
    • S(j);N_GUARD,SBLOCK::R(C),XP(h)
  • Tries
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • K(g);N_SPINQ(c),P-FLIGHT::QAR2(H),XR(f)
        • S(j);N_GUARD::R(C),XP(h)
      • Refutation
        • S(j);
  • Actual
    • S(E);P_SPINS(E),XP(h)
    • Threat
      • QAR1(H)
    • Vars
      • R(i);CHECK,OGATE,P_SPINR(i),XS(D)::QAB1(H),XR(i)
      • K(g);N_PINS(E),N_SPINQ(c),P_PINS(D),S_FLIGHT::S(E)
      • K(g);N_SPINQ(c),P-FLIGHT::QAR2(H),XR(f)
      • K(g);N_SPINQ(c),S_FLIGHT::S(D)
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