MESON Chess Problem Database

Problem Display
PID: 165224 (3k4/2RP3r/1b5p/1K2Q3/8/8/8/8 w - - 0 1)

Burr, Otto

Sachova skladba, 2007

3k4/2RP3r/1b5p/1K2Q3/8/8/8/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc7
      • 2.Qe8#
  • Tries
    • 1.Kc6?
      • threat
        • 2.Rc8#
        • 2.Qe8#
      • 1...Bxc7
        • 2.Qe8#
      • 1...Re7
        • 2.Rc8#
      • 1...Rh8
        • 2.Rc8#
        • 2.Qf6#
      • 1...Rxd7!
    • 1.Ra7?
      • threat
        • 2.Qe8#
      • 1...Rxd7
        • 2.Ra8#
      • 1...Re7
        • 2.Qb8#
      • 1...Rh8
        • 2.Qf6#
      • 1...Bxa7!
    • 1.Qd6?
      • threat
        • 2.Rc8#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Bxc7!
    • 1.Qe6?
      • threat
        • 2.Rc8#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Bxc7
        • 2.Qe8#
      • 1...Kxc7!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Qe8#
      • 1...Rxd7
        • 2.Rb8#
      • 1...Re7
        • 2.Qb8#
      • 1...Rh8
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK,XR(C)::QAR1(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XR(C)::QAR1(B)
        • R(c);::R1(C)
      • Refutation
        • R(c);XP(D)
    • Try
      • R(C);
      • Threat
        • QAR1(B)
      • Vars
        • R(c);SBLOCK,XP(D)::R(C)
        • R(c);SBLOCK::QAR2(B)
        • R(c);N_GUARD::QAB(B)
      • Refutation
        • B(a);XR(C)
    • Try
      • Q(B);
      • Threat
        • R1(C)
      • Vars
        • R(c);OGATE,P_SPINR(c),XP(D)::QAR1(B),XR(c)
      • Refutation
        • B(a);XR(C)
    • Try
      • Q(B);
      • Threat
        • R1(C)
      • Vars
        • R(c);OGATE,XP(D)::QAR1(B),XR(c)
        • B(a);SBLOCK,XR(C)::QAR1(B)
      • Refutation
        • K(d);S_FLIGHT,XR(C)
  • Actual
    • R(C);
    • Threat
      • QAR1(B)
    • Vars
      • R(c);SBLOCK,XP(D)::R(C)
      • R(c);SBLOCK::QAR2(B)
      • R(c);N_GUARD::QAB(B)
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