MESON Chess Problem Database

Problem Display
PID: 94565 (8/2p5/2B5/b7/N2P4/k1p5/P1P1p1p1/R3Q1Kb w - - 0 1)

Cresswell, James E

British Chess Magazine, 1964

8/2p5/2B5/b7/N2P4/k1p5/P1P1p1p1/R3Q1Kb

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Qxc3#
    • 1...Bb4
      • 2.Qc1#
    • 1...Bb6
      • 2.Qxc3#
  • Tries
    • 1.Sc5?
      • 1...Kb2
        • 2.Qc1#
      • 1...Bb4
        • 2.Qc1#
      • 1...Bb6
        • 2.Qxc3#
      • 1...Kb4!
    • 1.Sb6?
      • 1...Kb2
        • 2.Qc1#
      • 1...Kb4
        • 2.a3#
      • 1...Bxb6
        • 2.Qxc3#
      • 1...Bb4
        • 2.Sc4#
        • 2.Qc1#
      • 1...cxb6!
    • 1.d5?
      • 1...Kb4
        • 2.Qxc3#
      • 1...Bb4
        • 2.Qc1#
      • 1...Bb6+!
  • Keys
    • 1.Sb2!
      • 1...Kxb2
        • 2.Qc1#
      • 1...Kb4
        • 2.a3#
      • 1...cxb2
        • 2.Qxa5#
      • 1...Bb4
        • 2.Sc4#
      • 1...Bb6
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
    • B(f);SBLOCK::QAB(B)
    • B(f);N_GUARD,P_PINP(G)::QAR2(B),XP(e)
  • Tries
    • Try
      • S(F);
      • Vars
        • K(d);S_FLIGHT::QAB1(B)
        • B(f);SBLOCK::QAB(B)
        • B(f);N_GUARD::QAR2(B),XP(e)
      • Refutation
        • K(d);P_SPINP(e),S_FLIGHT
    • Try
      • S(F);
      • Vars
        • K(d);S_FLIGHT::QAB1(B)
        • K(d);OGATE,P_SPINP(e),S_FLIGHT::P(D)
        • B(f);N_GUARD,P_PINP(G),XS(F)::QAR2(B),XP(e)
      • Refutation
        • P(g);XS(F)
    • Try
      • P(G);
      • Vars
        • K(d);P_SPINP(e),S_FLIGHT::QAB1(B),XP(e)
        • B(f);SBLOCK::QAB(B)
      • Refutation
        • B(f);CHECK
  • Actual
    • S(F);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(B)
      • K(d);OGATE,P_SPINP(e),S_FLIGHT::P(D)
      • P(e);OGATE,SBLOCK,XS(F)::QAR2(B),XB(f)
      • B(f);SBLOCK::S(F)
      • B(f);N_GUARD,P_PINP(G)::QAR2(B),XP(e)
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