MESON Chess Problem Database

Problem Display
PID: 11716 (R1b2n1R/1pPk4/1P1P3N/6P1/NB2B3/2P4K/1PQ5/8 w - - 0 1)

Opalek, Cyril

1st HM., Hlas l'udu, 1971

R1b2n1R/1pPk4/1P1P3N/6P1/NB2B3/2P4K/1PQ5/8

#2

14 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5+?
      • 1...Ke8+
        • 2.Rxc8#
      • 1...Kxd6+!
    • 1.Rh7+?
      • 1...Ke6
        • 2.Re7#
      • 1...Ke8+
        • 2.Rxc8#
      • 1...Sxh7!
    • 1.Qb3?
      • threat
        • 2.Qf7#
      • 1...Ke8+
        • 2.Qe6#
      • 1...Sg6
        • 2.Rd8#
      • 1...Se6!
    • 1.Qd3?
      • 1...Ke8+
        • 2.d7#
      • 1...Se6
        • 2.Qb5#
      • 1...Sg6
        • 2.Sc5#
      • 1...Sh7
        • 2.Sc5#
      • 1...Ke6!
    • 1.Qf2?
      • threat
        • 2.Qf7#
      • 1...Ke6
        • 2.Qf5#
      • 1...Sg6
        • 2.Qf5#
      • 1...Ke8+!
  • Keys
    • 1.Qe2!
      • 1...Ke8+
        • 2.Bf5#
      • 1...Ke6
        • 2.Bc6#
      • 1...Se6
        • 2.Qb5#
      • 1...Sg6
        • 2.Qg4#
      • 1...Sh7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(b);CHECK,P_SPINB(c),P_SPINS(d),S_FLIGHT::R(M),XB(c)
      • Refutation
        • K(b);CHECK,P-FLIGHT,XP(J)
    • Try
      • R(N);CHECK
      • Vars
        • K(b);S_FLIGHT::R1(N)
        • K(b);CHECK,P_SPINB(c),S_FLIGHT::R(M),XB(c)
      • Refutation
        • S(d);XR(N)
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);CHECK,P_SPINB(c),P_SPINS(d),S_FLIGHT::QAR2(B)
        • S(d);OGATE::R1(N)
      • Refutation
        • S(d);
    • Try
      • Q(B);
      • Vars
        • K(b);CHECK,OGATE,P_SPINB(c),P_SPINS(d),S_FLIGHT::P(J)
        • S(d);SBLOCK::QAB(B)
        • S(d);::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • S(d);N_GUARD::QAB(B)
      • Refutation
        • K(b);CHECK,P_SPINB(c),P_SPINS(d),S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(b);CHECK,P_SPINB(c),P_SPINS(d),S_FLIGHT::QAR(B)+B(G)
      • K(b);S_FLIGHT::QAR(B)+B(G)
      • S(d);SBLOCK::QAB(B)
      • S(d);N_GUARD::QAB(B)
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