MESON Chess Problem Database

Problem Display
PID: 148310 (2R2Q1K/3p4/1p2p3/1P2kp2/1N1qp3/7N/8/B7 w - - 0 1)

Anonymous

Leeds Mercury, 1901

(First published on Sat Nov 23 1901)

2R2Q1K/3p4/1p2p3/1P2kp2/1N1qp3/7N/8/B7

#2

7 + 7

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Bxb2#
    • 1...Qc3
      • 2.Bxc3#
    • 1...f4
      • 2.Qxf4#
    • 1...d5
      • 2.Sc6#
    • 1...d6
      • 2.Qg7#
  • Tries
    • 1.Rc5+?
      • 1...d5
        • 2.Sc6#
      • 1...bxc5!
  • Keys
    • 1.Rc3!
      • 1...Qxc3
        • 2.Bxc3#
      • 1...Qxb4
        • 2.Rc5#
      • 1...Qg1
        • 2.Rc5#
      • 1...Qf2
        • 2.Rc5#
      • 1...Qe3
        • 2.Rxe3#
        • 2.Rc5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qd1
        • 2.Rc5#
      • 1...Qd2
        • 2.Rc5#
      • 1...Qd3
        • 2.Rxd3#
        • 2.Rc5#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Qd5
        • 2.Rc5#
      • 1...Qd6
        • 2.Rc5#
        • 2.Qg7#
      • 1...e3
        • 2.Rxe3#
      • 1...f4
        • 2.Qxf4#
      • 1...d5
        • 2.Sc6#
      • 1...d6
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • Q(a);OGATEB::B(A),XQ(a)
    • P(d);OGATE::QAB1(F),XP(d)
    • P(g);N_GUARD,SBLOCK::S(C)
    • P(g);SBLOCK::QAB(F)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • P(g);P_SPINP(g)::S(C)
      • Refutation
        • P(e);XR(E)
  • Actual
    • R(E);N_PINQ(a)
    • Vars
      • Q(a);OGATE,P_SPINQ(a),XR(E)::B(A),XQ(a)
      • Q(a);XS(C)::B(A)+R(E),DCHECK
      • Q(a);::B(A)+R(E),DCHECK
      • Q(a);::B(A)+R(E),DCHECK,XQ(a)
      • Q(a);OGATEB::B(A)+R(E),XQ(a)
      • Q(a);S_CUTP(e),S_CUTP(g)::B(A)+R(E)
      • P(b);OGATEB::R(E),XP(b)
      • P(d);OGATE::QAB1(F),XP(d)
      • P(g);N_GUARD,SBLOCK::S(C)
      • P(g);SBLOCK::QAB(F)
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