MESON Chess Problem Database

Problem Display
PID: 6186 (8/8/8/4p3/4K3/5QpN/7k/6Nr w - - 0 1)

Caine, Walter Edmund

The Problemist, 1927

8/8/8/4p3/4K3/5QpN/7k/6Nr

#2

4 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Kxe5?
      • 1...g2
        • 2.Qf4#
      • 1...Rxg1!
    • 1.Sf4?
      • threat
        • 2.Qg2#
      • 1...Kxg1
        • 2.Qg2#
      • 1...Rxg1
        • 2.Qh5#
      • 1...g2
        • 2.Qxg2#
      • 1...exf4!
    • 1.Qg4?
      • 1...Kg2
        • 2.Qe2#
      • 1...g2
        • 2.Sf3#
      • 1...Rxg1!
  • Keys
    • 1.Qh5!
      • 1...Kg2
        • 2.Qe2#
      • 1...Rxg1
        • 2.Sf4#
      • 1...g2
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(D);P-FLIGHT,XP(d)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • R(a);XS(A)
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);S_FLIGHT,XS(A)::QAR1(B)
        • R(a);SBLOCK,XS(A)::QAR(B)
        • P(c);::QAR1(B),XP(c)
      • Refutation
        • P(d);XS(C)
    • Try
      • Q(B);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c)::QAR2(B)
        • P(c);::S(A)
      • Refutation
        • R(a);XS(A)
  • Actual
    • Q(B);
    • Vars
      • K(b);P-FLIGHT::QAR2(B)
      • R(a);SBLOCK,XS(A)::QAR(B)+S(C)
      • P(c);OGATEB,SBLOCK::QAB(B),XP(d)
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