MESON Chess Problem Database

Problem Display
PID: 87919 (Q6r/1R6/2R5/4pPB1/3nkPP1/1p5P/1P5p/q1NN1B1K w - - 0 1)

Erokhin, Vladimir Alekseevich

Buletin Problemistic, 1973

Q6r/1R6/2R5/4pPB1/3nkPP1/1p5P/1P5p/q1NN1B1K

#2

13 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Bd3+?
      • 1...Kd5
        • 2.Rd7#
      • 1...Kf3!
    • 1.Rb4?
      • threat
        • 2.Bg2#
      • 1...Kf3
        • 2.Rc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Qxb2
        • 2.Rc8#
      • 1...Rxh3
        • 2.Ra6#
      • 1...exf4
        • 2.Re6#
      • 1...Qxc1!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Bg2#
      • 1...Kf3
        • 2.Rxb3#
      • 1...Kd5
        • 2.Rd7#
      • 1...Qxb2
        • 2.Rb8#
      • 1...Qxc1
        • 2.Rb8#
      • 1...Rxh3
        • 2.Ra7#
      • 1...exf4
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(e);S_FLIGHT::R(L)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • R(L);P_PINS(d)
      • Threat
        • B(C)
      • Vars
        • K(e);N_SPINS(d),S_FLIGHT::QAB(M)+R(K),DCHECK
        • K(e);N_SPINS(d),S_FLIGHT::S(B)
        • Q(a);N_GUARD,XP(E)::QAB(M)+R(K)
        • R(g);N_GUARD,XP(F)::QAB(M)+R(K)
        • P(f);XP(G)::QAB(M)+R(K),DCHECK
      • Refutation
        • Q(a);XS(A)
  • Actual
    • R(K);P_PINS(d)
    • Threat
      • B(C)
    • Vars
      • K(e);N_SPINS(d),S_FLIGHT::QAB(M)+R(L),DCHECK,XP(c)
      • K(e);N_SPINS(d),S_FLIGHT::QAB(M)+R(L),DCHECK
      • Q(a);N_GUARD,XP(E)::QAB(M)+R(L)
      • Q(a);N_GUARD,XS(A)::QAB(M)+R(L)
      • R(g);N_GUARD,XP(F)::QAB(M)+R(L)
      • P(f);XP(G)::QAB(M)+R(L),DCHECK
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