MESON Chess Problem Database

Problem Display
PID: 99051 (K7/Q6B/8/1N6/1P6/BrP2p2/kP6/1R6 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

3rd Prize, Bevelezesi Sakkhirado, 1984

K7/Q6B/8/1N6/1P6/BrP2p2/kP6/1R6

#2

9 + 3

6490 yacpdb 2009
102 Probleemblad 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Qxa3#
  • Tries
    • 1.Bc2?
      • 1...Rxb2
        • 2.Bxb2#
      • 1...Rxa3
        • 2.Qxa3#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Rxb4
        • 2.Bxb4#
      • 1...f2!
    • 1.Qa4?
      • 1...Rxb2
        • 2.Bxb2#
      • 1...Rxa3
        • 2.Qxa3#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Rxb4
        • 2.Bxb4#
      • 1...f2!
  • Keys
    • 1.Qf2!
      • 1...Rxa3+
        • 2.bxa3#
      • 1...Rxb2
        • 2.Qxb2#
      • 1...Rxc3
        • 2.bxc3#
      • 1...Rxb4
        • 2.b3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • R(b);OGATE,P_PINQ(G),P_SPINR(b),XB(C)::QAR1(G),XR(b)
  • Tries
    • Try
      • B(H);
      • Vars
        • R(b);OGATE,XP(B)::QAR(G)+B(C),XR(b)
        • R(b);OGATE,P_PINQ(G),P_SPINR(b),XB(C)::QAR1(G),XR(b)
        • R(b);XP(D)::S(F),XR(b)
        • R(b);OGATE,XP(E)::QAR(G)+B(C),XR(b)
      • Refutation
        • P(c);
    • Try
      • Q(G);
      • Vars
        • R(b);OGATE,XP(B)::QAR(G)+B(C),XR(b)
        • R(b);OGATE,P_PINQ(G),P_SPINR(b),XB(C)::QAR1(G),XR(b)
        • R(b);XP(D)::S(F),XR(b)
        • R(b);OGATE,XP(E)::QAR(G)+B(C),XR(b)
      • Refutation
        • P(c);
  • Actual
    • Q(G);
    • Vars
      • R(b);CHECK,OGATE,XB(C)::QAR(G)+P(B),XR(b)
      • R(b);OGATE,P_SPINR(b),XP(B)::QAR1(G),XR(b)
      • R(b);OGATE,XP(D)::QAR(G)+P(B),XR(b)
      • R(b);OGATE,XP(E)::QAR(G)+P(B)
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