MESON Chess Problem Database

Problem Display
PID: 15602 (3B1RB1/2pp3b/K1p5/Rn1rk3/1Q1N2pp/3Pp3/3N2n1/4br1q w - - 0 1)

Opalek, Cyril

1st HM., Hlas l'udu, 1986

3B1RB1/2pp3b/K1p5/Rn1rk3/1Q1N2pp/3Pp3/3N2n1/4br1q

#2

9 + 14

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Re8#
    • 1...Rxd4
      • 2.Qe7#
    • 1...Sf4
      • 2.Bf6#
    • 1...Sxd4
      • 2.Sc4#
    • 1...d6
      • 2.Sxc6#
  • Tries
    • 1.Bxc7+?
      • 1...Rd6
        • 2.Bxd6#
        • 2.Qc5#
        • 2.Qxd6#
      • 1...Sd6
        • 2.Bxd6#
      • 1...d6
        • 2.Sxc6#
      • 1...Sxc7+!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qe4#
      • 1...Rxf5
        • 2.Re8#
      • 1...Bxf5
        • 2.Bf6#
      • 1...Rd4
        • 2.Qxd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rf4
        • 2.Qe7#
      • 1...Sf4
        • 2.Sc4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sd6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(b);SBLOCK::R(H)
    • R(i);P_SPINS(h),SBLOCK,XS(D)::QAR2(C)
    • S(d);SBLOCK,S_CUTR(b)::B(G)
    • S(h);P_SPINR(i),SBLOCK,XS(D)::S(A)
    • P(m);N_GUARD::S(D),XP(k)
  • Tries
    • Try
      • B(G);CHECK,XP(l)
      • Vars
        • S(h);N_GUARD,P_SPINR(i),P_SPINS(h)::B(G),XS(h)
        • P(m);P_SPINP(m)::S(D),XP(k)
      • Refutation
        • S(h);CHECK,P_SPINR(i),XB(G)
  • Actual
    • S(D);
    • Threat
      • QAR1(C)
    • Vars
      • R(b);SBLOCK,XS(D)::R(H)
      • B(n);SBLOCK,XS(D)::B(G)
      • R(i);N_GUARD,P_SPINS(h)::QAB1(C),XR(i)
      • S(h);N_GUARD,P_SPINR(i)::QAB1(C),XS(h)
      • R(b);SBLOCK::QAR2(C)
      • S(d);SBLOCK::S(A)
      • S(h);N_GUARD,P_SPINR(i)::QAB1(C)
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