MESON Chess Problem Database

Problem Display
PID: 26004 (8/4pB1K/1Q6/1P2PP1N/Rn1Nk2p/4P2P/2P4R/B7 w - - 0 1)

Kondratiev, Pavel E

2nd Prize, Novosibirsk CT, 1993

8/4pB1K/1Q6/1P2PP1N/Rn1Nk2p/4P2P/2P4R/B7

#2

14 + 4

3705 Album Russia (1992-1994) 2000
56 The Problemist 2001
136 Problem Observer 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Re2#
    • 1...Kxe5
      • 2.Qe6#
  • Tries
    • 1.Sb3?
      • 1...Kf3
        • 2.Sd2#
      • 1...Kxf5
        • 2.Qg6#
      • 1...e6!
    • 1.Sg3+?
      • 1...Kxe3
        • 2.Qh6#
      • 1...Kxe5
        • 2.Sde2#
        • 2.Sb3#
        • 2.Sf3#
        • 2.Qe6#
      • 1...hxg3!
    • 1.Rxb4?
      • 1...Kxe3
        • 2.Re2#
      • 1...Kxe5
        • 2.Qe6#
      • 1...e6!
  • Keys
    • 1.Se6!
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf5
        • 2.Bg6#

There are these versions: 132777

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(D)::R1(C)
    • K(b);OGATEB,P-FLIGHT,XP(I)::QAR1(L)
  • Tries
    • Try
      • S(G);P_PINS(a)
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(G)
        • K(b);N_SPINS(a),OGATEB,S_FLIGHT,XP(J)::QAB1(L)
      • Refutation
        • P(d);
    • Try
      • S(K);CHECK
      • Vars
        • K(b);P-FLIGHT,XP(D)::QAB(L)
      • Refutation
        • P(c);XS(K)
    • Try
      • R(F);XS(a)
      • Vars
        • K(b);OGATEB,P-FLIGHT,XP(D)::R1(C)
        • K(b);OGATEB,P-FLIGHT,XP(I)::QAR1(L)
      • Refutation
        • P(d);
  • Actual
    • S(G);P_PINS(a)
    • Vars
      • K(b);N_SPINS(a),S_FLIGHT::S(G)
      • K(b);N_SPINS(a),S_FLIGHT::QAR1(L)
      • K(b);N_SPINS(a),OGATEB,S_FLIGHT,XP(J)::B(M)
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