MESON Chess Problem Database

Problem Display
PID: 157397 (2Q5/8/6BK/8/8/prR1R3/qk6/8 w - - 0 1)

Vladimirov, Yakov Georgevich

Lud, 1967

2Q5/8/6BK/8/8/prR1R3/qk6/8

#2

5 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Re2#
    • 1...Rxc3
      • 2.Qxc3#
  • Tries
    • 1.Rc1?
      • threat
        • 2.Re2#
        • 2.Qc2#
      • 1...Rxe3
        • 2.Qc2#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Rd3
        • 2.Qc2#
      • 1...Rb4
        • 2.Qc2#
        • 2.Qc3#
      • 1...Rb5
        • 2.Qc2#
        • 2.Qc3#
      • 1...Rb6
        • 2.Qc2#
        • 2.Qc3#
      • 1...Rb7
        • 2.Qc2#
        • 2.Qc3#
      • 1...Rb8
        • 2.Qc2#
        • 2.Qc3#
      • 1...Qb1!
    • 1.Rc2+?
      • 1...Kb1
        • 2.Re1#
      • 1...Ka1!
  • Keys
    • 1.Qh8!
      • 1...Ka1
        • 2.Rc1#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Qb1
        • 2.Rc2#
      • 1...Qa1
        • 2.Re2#
      • 1...Rb4
        • 2.Rc4#
      • 1...Rb5
        • 2.Rc5#
      • 1...Rb6
        • 2.Rc6#
      • 1...Rb7
        • 2.Rc7#
      • 1...Rb8
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • Q(a);SBLOCK::R(B)
    • R(d);OGATE,XR(A)::QAB1(E),XR(d)
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);XR(B)::QAR1(E)
        • R(d);N_GUARD::QAB1(E),XR(d)
        • R(d);::QAR1(E)
      • Refutation
        • Q(a);
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB(E)+R(A),DCHECK
      • R(d);OGATE,P_SPINR(d),XR(A)::QAB1(E),XR(d)
      • Q(a);SBLOCK::QAB(E)+R(A),DCHECK
      • Q(a);SBLOCK::R(B)
      • R(d);N_GUARD::QAB(E)+R(A)
      • R(d);N_GUARD,P_PINB(C)::QAB(E)+R(A)
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