MESON Chess Problem Database

Problem Display
PID: 67926 (8/8/K2P2p1/B2kP1P1/NP1pp1QR/4p3/2N1P3/2R5 w - - 0 1)

Rudenko, Valentin Fedorovich

2nd Prize, Smer, 1960

8/8/K2P2p1/B2kP1P1/NP1pp1QR/4p3/2N1P3/2R5

#2

12 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qe6#
    • 1...Kc6
      • 2.Sxe3#
  • Tries
    • 1.Sxd4?
      • threat
        • 2.Qxe4#
      • 1...Kxd4
        • 2.Qxe4#
      • 1...Kxe5!
    • 1.Sb6+?
      • 1...Kc6
        • 2.Sa1#
        • 2.Se1#
        • 2.Sa3#
        • 2.Sxe3#
        • 2.Sxd4#
        • 2.Qd7#
        • 2.Qc8#
        • 2.Qxe4#
      • 1...Kxe5!
    • 1.Bc7?
      • 1...Kc4
        • 2.Qe6#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Kc6
        • 2.Sxe3#
      • 1...d3!
    • 1.Qe6+?
      • 1...Kc6
        • 2.Sa1#
        • 2.Se1#
        • 2.Sa3#
        • 2.Sxe3#
        • 2.Sxd4#
        • 2.b5#
        • 2.d7#
      • 1...Kxe6!
    • 1.Qxe4+?
      • 1...Kc4
        • 2.Sa1#
        • 2.Sxd4#
      • 1...Ke6!
  • Keys
    • 1.Sc5!
      • 1...Kc4
        • 2.Sxe3#
      • 1...Kxe5
        • 2.Qe6#
      • 1...Kc6
        • 2.Qxe4#
      • 1...d3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT::QAB(F)
    • K(d);S_FLIGHT::R(A)+S(B),XP(a)
  • Tries
    • Try
      • S(B);XP(b)
      • Threat
        • QAB1(F),XP(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINP(c),XS(B)::QAR1(F),XP(c)
      • Refutation
        • K(d);P-FLIGHT,XP(I)
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);P-FLIGHT,XP(I)
    • Try
      • B(H);
      • Vars
        • K(d);S_FLIGHT::QAB(F)
        • K(d);P-FLIGHT,XP(I)::QAR1(F),XP(c)
        • K(d);S_FLIGHT::R(A)+S(B),XP(a)
      • Refutation
        • P(b);
    • Try
      • Q(F);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(F)
    • Try
      • Q(F);CHECK,XP(c)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(d);S_FLIGHT::R(A)+S(B),DCHECK,XP(a)
      • K(d);P-FLIGHT,XP(I)::QAR1(F)
      • K(d);S_FLIGHT::QAB(F),XP(c)
      • P(b);::QAB1(F),XP(c)
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