MESON Chess Problem Database

Problem Display
PID: 158571 (1R2K2B/7B/3p1p2/pn1k1N1R/8/6P1/P1N3P1/4Q3 w - - 0 1)

Pniak, Edmund Jan

3rd Comm., Israel Ring Ty., 1952

1R2K2B/7B/3p1p2/pn1k1N1R/8/6P1/P1N3P1/4Q3

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Sfe3#
  • Tries
    • 1.Kd7?
      • threat
        • 2.Sfe3#
      • 1...Kc4
        • 2.Sfe3#
      • 1...Kc5!
    • 1.Sfe3+?
      • 1...Ke6
        • 2.Sd1#
        • 2.Sf1#
        • 2.Sc4#
        • 2.Sg4#
        • 2.Sd5#
        • 2.Bg8#
      • 1...Kc6!
    • 1.Rxb5+?
      • 1...Kc4
        • 2.Sfe3#
        • 2.Sxd6#
      • 1...Kc6!
    • 1.Rc8?
      • threat
        • 2.Se7#
        • 2.Bg8#
      • 1...Sd4
        • 2.Se7#
      • 1...Sc7+!
    • 1.Qe2?
      • threat
        • 2.Se7#
      • 1...Kc5
        • 2.Qxb5#
      • 1...Kc6
        • 2.Qc4#
      • 1...Sc7+!
    • 1.Qe4+?
      • 1...Kxe4
        • 2.Sxd6#
      • 1...Kc5!
    • 1.Qe6+?
      • 1...Kc6
        • 2.Qc4#
      • 1...Kxe6
        • 2.Sg7#
      • 1...Kc5!
  • Keys
    • 1.Qxa5!
      • 1...Kc4
        • 2.Sfe3#
      • 1...Ke4
        • 2.Sxd6#
      • 1...Kc5
        • 2.Qxb5#
      • 1...Ke5
        • 2.Sfd4#
      • 1...Kc6
        • 2.Se7#
      • 1...Ke6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(F)
  • Tries
    • Try
      • K(J);S_FLIGHT
      • Threat
        • R(G)+S(F),DCHECK
      • Vars
        • K(c);S_FLIGHT::S(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(I);CHECK,XS(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::R(G)+S(F),DCHECK
      • Refutation
        • S(b);CHECK
    • Try
      • Q(A);
      • Threat
        • R(G)+S(F),DCHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(A),XS(b)
        • K(c);S_FLIGHT::QAR2(A)
      • Refutation
        • S(b);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XQ(A)::B(H)+S(F),DCHECK,XP(d)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATE,P_SPINP(d),S_FLIGHT::QAR2(A)
        • K(c);S_FLIGHT,XQ(A)::S(F)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(A);P_PINS(b),XP(a)
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT::S(F)
      • K(c);N_SPINS(b),S_FLIGHT::B(H)+S(F),DCHECK,XP(d)
      • K(c);P-FLIGHT::QAR1(A),XS(b)
      • K(c);P-FLIGHT,P_SPINP(e)::R(G)+S(F)
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