MESON Chess Problem Database

Problem Display
PID: 87711 (1B6/8/8/4R3/1K1k2P1/1b2rP1Q/8/1B4b1 w - - 0 1)

Pachl, Franz

The Problemist, 1988

1B6/8/8/4R3/1K1k2P1/1b2rP1Q/8/1B4b1

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qg3?
      • threat
        • 2.Ba7#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rc3
        • 2.Qf4#
      • 1...Bc2!
    • 1.Qh6?
      • threat
        • 2.Qb6#
      • 1...Rxe5
        • 2.Qd2#
      • 1...Bc2
        • 2.Qd6#
      • 1...Rc3
        • 2.Qf4#
      • 1...Be6!
    • 1.Qh7?
      • threat
        • 2.Qa7#
      • 1...Rxe5
        • 2.Qd3#
      • 1...Rc3
        • 2.Qe4#
      • 1...Bc2
        • 2.Qd7#
      • 1...Bf7!
    • 1.Qh8?
      • threat
        • 2.Ba7#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Bc2
        • 2.Qd8#
      • 1...Rc3!
    • 1.f4?
      • threat
        • 2.Ba7#
      • 1...Rxe5
        • 2.Qd3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Bc2!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Ba7#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Bc2
        • 2.Rd5#
      • 1...Rc3
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(C);
      • Threat
        • B(G)
      • Vars
        • R(c);OGATE,XR(F)::QAB1(C),XR(c)
        • R(c);N_GUARD::QAR2(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(c);OGATE,XR(F)::QAR2(C)
        • B(b);N_GUARD::QAR2(C)
        • R(c);N_GUARD::QAR2(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • R(c);N_GUARD,XR(F)::QAR1(C)
        • R(c);N_GUARD::QAR1(C)
        • B(b);N_GUARD::QAR(C)
      • Refutation
        • B(b);
    • Try
      • Q(C);
      • Threat
        • B(G)
      • Vars
        • R(c);OGATE,P_SPINR(c),XR(F)::QAB1(C),XR(c)
        • B(b);N_GUARD::QAR(C)
      • Refutation
        • R(c);
    • Try
      • P(B);
      • Threat
        • B(G)
      • Vars
        • R(c);OGATE,XR(F)::QAR1(C)
        • R(c);OGATE::QAB1(C),XR(c)
      • Refutation
        • B(b);
  • Actual
    • Q(C);
    • Threat
      • B(G)
    • Vars
      • R(c);OGATE,XR(F)::QAB1(C),XR(c)
      • B(b);N_GUARD::R1(F)
      • R(c);N_GUARD::R1(F)
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