MESON Chess Problem Database

Problem Display
PID: 2892 (2N1k3/K4NB1/8/5Rrp/4p1pQ/5R2/8/8 w - - 0 1)

van Beek, Huibrecht

Source?, 1903

2N1k3/K4NB1/8/5Rrp/4p1pQ/5R2/8/8

#2

7 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Qe7#
    • 1...Rg6
      • 2.Qe7#
      • 2.Qd8#
    • 1...Rxg7
      • 2.Qe7#
      • 2.Qd8#
  • Tries
    • 1.Rd3?
      • threat
        • 2.Rd8#
      • 1...Rxf5
        • 2.Qe7#
      • 1...exd3!
    • 1.Re5+?
      • 1...Rxe5
        • 2.Qd8#
      • 1...Kd7!
  • Keys
    • 1.Sb6!
      • 1...Ke7
        • 2.Re5#
      • 1...Rxf5
        • 2.Sd6#
      • 1...Rxg7
        • 2.Qd8#
      • 1...exf3
        • 2.Qe1#
      • 1...gxf3
        • 2.Qxe4#
      • 1...Rg6
        • 2.Qd8#
      • 1...e3
        • 2.Rxe3#
      • 1...g3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XR(C)::QAR1(B)
  • Tries
    • Try
      • R(A);
      • Threat
        • R1(A)
      • Vars
        • R(c);OGATE,XR(C)::QAR1(B)
      • Refutation
        • P(a);XR(A)
    • Try
      • R(C);CHECK
      • Vars
        • R(c);OGATE,XR(C)::QAR1(B)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(G);
    • Vars
      • K(e);P-FLIGHT,P_SPINR(c)::R(C)
      • R(c);XR(C)::S(E)
      • R(c);OGATE,P_PINS(E),XB(F)::QAR1(B)
      • P(a);OGATEB,XR(A)::QAB(B)
      • P(b);OGATE,XR(A)::QAR(B),XP(a)
      • R(c);OGATE::QAR1(B)
      • P(a);OGATEB::R(A),XP(a)
      • P(b);OGATE::QAR(B),XP(a)
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