MESON Chess Problem Database

Problem Display
PID: 277904 (8/1p6/b2Q1P1K/p4kPp/rRp2N1p/4p3/qnr4P/1B2N1R1 w - - 0 1)

Belchikov, Nikolai Ivanovich

Cyrulik, Stepan Pavlovich

Tikhankov, Vladimir Nikolaevich

1/2 Prize, Raketa, 1989-1990

8/1p6/b2Q1P1K/p4kPp/rRp2N1p/4p3/qnr4P/1B2N1R1

#2

10 + 12

SOLUTION

  • SOUND
  • Tries
    • 1.Seg2?
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qd5#
      • 1...c3
        • 2.Sxe3#
        • 2.Sxh4#
      • 1...Kg4!
    • 1.Se2?
      • threat
        • 2.Qd5#
      • 1...Ke4
        • 2.Qe6#
      • 1...c3
        • 2.Rf1#
      • 1...Sd3!
    • 1.Sg6?
      • threat
        • 2.Qe5#
        • 2.Qd5#
      • 1...Ke4
        • 2.Qe5#
      • 1...c3
        • 2.Sxh4#
        • 2.Se7#
        • 2.Qe5#
      • 1...Sd3!
    • 1.Rb5+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Bxb5!
  • Keys
    • 1.Rf1!
      • threat
        • 2.Qe6#
      • 1...Ke4
        • 2.Qd5#
      • 1...Kg4
        • 2.Qe6#
        • 2.Qd7#
      • 1...c3
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(H)
      • Vars
        • K(i);N_GUARD,P_SPINP(f),S_FLIGHT::QAB1(H)
      • Refutation
        • K(i);N_SPINR(c),S_FLIGHT
    • Try
      • S(F);
      • Threat
        • QAR2(H)
      • Vars
        • K(i);N_GUARD,P_SPINP(f),S_FLIGHT::QAR2(H)
        • P(f);::R(C)
      • Refutation
        • S(b);N_SPINR(c)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • K(i);P_SPINP(f),S_FLIGHT::QAR1(H)
      • Refutation
        • S(b);N_SPINR(c)
    • Try
      • R(E);CHECK
      • Vars
        • K(i);S_FLIGHT::QAR1(H)
      • Refutation
        • B(k);XR(E)
  • Actual
    • R(C);
    • Threat
      • QAB1(H)
    • Vars
      • K(i);N_GUARD,P_SPINP(f),S_FLIGHT::QAB1(H)
      • P(f);::R(C)+S(F)
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