MESON Chess Problem Database

Problem Display
PID: 49718 (4Q3/8/N2p2P1/3pp3/2pk4/3n1R2/2BRPP2/1KB5 w - - 0 1)

Fedyakov, Sergey

Shakhmaty, 1988

4Q3/8/N2p2P1/3pp3/2pk4/3n1R2/2BRPP2/1KB5

#2

10 + 6

5159 FIDE Album (1986-1988) (Annexe) 1996

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qa4#
    • 1...e4
      • 2.Qh8#
  • Tries
    • 1.Bb2+?
      • 1...c3
        • 2.Qa4#
      • 1...Ke4!
    • 1.Bxd3?
      • threat
        • 2.Bc2#
        • 2.Bf5#
      • 1...Kc3
        • 2.Bc2#
        • 2.Be4#
        • 2.Bf5#
      • 1...c3
        • 2.Qa4#
        • 2.e3#
      • 1...e4
        • 2.Bc2#
        • 2.Bxe4#
        • 2.Qh8#
      • 1...cxd3!
    • 1.Rdxd3+?
      • 1...Ke4
        • 2.Rd1#
        • 2.Rd2#
        • 2.Rf4#
      • 1...cxd3!
    • 1.Rfxd3+?
      • 1...Ke4
        • 2.Rf3#
        • 2.Rd4#
      • 1...cxd3!
    • 1.Re3?
      • 1...c3
        • 2.Qa4#
      • 1...e4
        • 2.Qh8#
      • 1...Kc3!
    • 1.Qa4?
      • 1...Kc3
        • 2.Qa1#
      • 1...e4
        • 2.Bb2#
      • 1...Ke4!
    • 1.Qd7?
      • 1...Ke4
        • 2.Qg4#
      • 1...e4
        • 2.Qg7#
      • 1...c3
        • 2.Qa4#
      • 1...Kc3!
    • 1.Qb8?
      • 1...Kc3
        • 2.Qb2#
      • 1...e4
        • 2.Qh8#
      • 1...c3
        • 2.Qb4#
      • 1...Ke4!
    • 1.Qc8?
      • 1...Kc3
        • 2.Rdxd3#
        • 2.Rfxd3#
      • 1...Ke4
        • 2.Qg4#
      • 1...e4
        • 2.Qh8#
      • 1...c3!
    • 1.Qh8?
      • 1...Ke4
        • 2.Qh4#
      • 1...c3
        • 2.Rf4#
      • 1...Kc3!
    • 1.exd3?
      • 1...Kc3
        • 2.d4#
      • 1...c3
        • 2.Qa4#
      • 1...e4
        • 2.Qh8#
        • 2.dxe4#
      • 1...cxd3!
    • 1.e3+?
      • 1...Ke4
        • 2.Rf4#
      • 1...Kc3!
  • Keys
    • 1.Rd1!
      • 1...Kc3
        • 2.Bb2#
      • 1...Ke4
        • 2.Rf4#
      • 1...c3
        • 2.Qa4#
      • 1...e4
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB,SBLOCK::QAR(J)
    • P(e);OGATEB,SBLOCK::QAB(J)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR(J)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(e)
    • Try
      • B(C);XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • P(b);P_SPINP(b),XB(C)
    • Try
      • R(D);CHECK,XS(a)
      • Refutation
        • P(b);XR(D)
    • Try
      • R(G);CHECK,XS(a)
      • Refutation
        • P(b);P_SPINP(b),XR(G)
    • Try
      • R(G);
      • Vars
        • P(b);OGATEB,SBLOCK::QAR(J)
        • P(e);OGATEB::QAB(J)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(J);P_PINP(b)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::QAB(J)
        • P(e);SBLOCK::B(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(c);P-FLIGHT::QAR2(J)
        • P(e);OGATEB,SBLOCK::QAB(J)
        • P(b);OGATEB,SBLOCK::QAR(J)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(c);S_FLIGHT::QAB1(J)
        • P(e);OGATEB,SBLOCK::QAB(J)
        • P(b);OGATEB::QAR2(J)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(c);P-FLIGHT::QAR2(J)
        • P(e);OGATEB,SBLOCK::QAB(J)
      • Refutation
        • P(b);
    • Try
      • Q(J);P_PINP(e)
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAR(J)
        • P(b);SBLOCK::R(G)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(E);XS(a)
      • Vars
        • K(c);OGATE,S_FLIGHT::R(G)+P(E)
        • P(b);OGATEB,SBLOCK::QAR(J)
      • Refutation
        • P(b);P_SPINP(b),XP(E)
    • Try
      • P(E);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINP(e)::R1(G)
      • Refutation
        • K(c);N_SPINS(a),S_FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(c);S_FLIGHT::B(B)
      • K(c);P-FLIGHT,P_SPINP(e)::R1(G)
      • P(b);OGATEB,SBLOCK::QAR(J)
      • P(e);OGATEB,SBLOCK::QAB(J)
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