MESON Chess Problem Database

Problem Display
PID: 120906 (8/4N3/8/PR6/bpkN4/2p1Qp2/2R2K2/8 w - - 0 1)

Neyndorff, Luke

5th HM., Chess Life, 1985

8/4N3/8/PR6/bpkN4/2p1Qp2/2R2K2/8

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Rxc3#
      • 2.Qxc3#
  • Tries
    • 1.Rxb4+?
      • 1...Kxb4
        • 2.Qxc3#
      • 1...Kc5!
    • 1.Qe2+?
      • 1...Kxd4
        • 2.Sf5#
        • 2.Sc6#
        • 2.Rd5#
      • 1...fxe2!
    • 1.Qe6+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...Kd3!
  • Keys
    • 1.Sb3!
      • 1...Kxb3
        • 2.Qxc3#
      • 1...Kxb5
        • 2.Qd3#
      • 1...Bxb3
        • 2.Rc5#
      • 1...Bxb5
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK,XP(d)
      • Vars
        • K(e);N_SPINP(a),P-FLIGHT,XR(F)::QAB1(C),XP(a)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);N_SPINP(a),P-FLIGHT,XS(D)::QAR1(C)
      • Refutation
        • K(e);N_SPINP(a),S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(e);S_FLIGHT,XS(D)::QAR1(C),XP(a)
      • K(e);N_SPINP(a),S_FLIGHT,XR(F)::QAB(C)
      • B(c);SBLOCK,XS(D)::R1(F)
      • B(c);SBLOCK,XR(F)::S(D)
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