MESON Chess Problem Database

Problem Display
PID: 118348 (1r2k1r1/3pp1pN/4R3/B4R2/Q1BK4/8/8/8 w - - 0 1)

Rasmussen, Knud AK

Chess Life & Review, 1947

1r2k1r1/3pp1pN/4R3/B4R2/Q1BK4/8/8/8

#2

7 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Rxf8#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Bf7#
        • 2.Qxd7#
      • 1...e5+
        • 2.Rxe5#
      • 1...Rb6
        • 2.Qxd7#
      • 1...e6
        • 2.Rxe6#
        • 2.Qxd7#
      • 1...Rb4
        • 2.Qxd7#
      • 1...Rb5
        • 2.Bf7#
      • 1...Rb7
        • 2.Bf7#
      • 1...Rd8
        • 2.Bf7#
      • 1...Rf8
        • 2.Rxf8#
        • 2.Qxd7#
      • 1...exd6!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Bf7#
      • 1...e5+
        • 2.Rxe5#
      • 1...dxc6
        • 2.Qxc6#
      • 1...Rb6
        • 2.Rc8#
      • 1...d5
        • 2.Rc8#
      • 1...d6
        • 2.Rc8#
      • 1...e6
        • 2.Rxe6#
      • 1...Rb4
        • 2.Rc8#
      • 1...Rf8
        • 2.Rxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::R1(E),XR(f)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);CHECK,OGATEB::R(E),XP(b)
        • R(d);::QAB1(A),XP(a)
        • R(d);P_PINB(B)::QAB1(A),XP(a)
        • R(d);N_SPINP(a)::B(B)
        • R(d);::B(B)
      • Refutation
        • P(b);XR(F)
  • Actual
    • R(F);N_PINP(a)
    • Threat
      • B(B)
    • Vars
      • P(b);CHECK,OGATEB::R(E),XP(b)
      • P(a);OGATE,P_SPINP(a),XR(F)::QAB(A),XP(a)
      • R(d);N_GUARD::R(F)
      • P(a);::QAB(A)+R(F),DCHECK
      • P(b);OGATEB::R(F),XP(b)
      • R(d);N_GUARD,P_PINB(B)::R(F)
      • R(f);N_GUARD::R1(E),XR(f)
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