MESON Chess Problem Database

Problem Display
PID: 37156 (1k2K3/2p1N3/8/1p6/2R2p2/4B1Q1/6B1/8 w - - 0 1)

Haring, Jacobus

2nd HM., CSTV, 1969

1k2K3/2p1N3/8/1p6/2R2p2/4B1Q1/6B1/8

#2

6 + 4

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3
      • 2.Qxc7#
    • 1...b4
      • 2.Rxb4#
  • Tries
    • 1.Rxf4?
      • 1...c5
        • 2.Ra4#
      • 1...b4
        • 2.Rxb4#
      • 1...c6!
    • 1.Qf3?
      • threat
        • 2.Qb7#
        • 2.Qa8#
      • 1...c5
        • 2.Qb7#
      • 1...c6!
  • Keys
    • 1.Rxc7!
      • threat
        • 2.Rc8#
      • 1...Kxc7
        • 2.Qxf4#
      • 1...fxe3
        • 2.Rd7#
      • 1...f3
        • 2.Ra7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE,P_SPINP(c),XB(B)::QAB1(C),XP(c)
    • P(b);OGATEB::R(D),XP(b)
  • Tries
    • Try
      • R(D);XP(a)
      • Vars
        • P(c);OGATEB::QAB(C)+R(D)
        • P(b);OGATEB::R(D),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAR1(C)
      • Refutation
        • P(c);
  • Actual
    • R(D);XP(c)
    • Threat
      • R1(D)
    • Vars
      • K(d);OGATEB,P_SPINP(a),S_FLIGHT,XR(D)::QAB(C),XP(a)
      • P(a);OGATEB,XB(B)::QAB(C)+R(D)
      • P(a);OGATEB::QAB(C)+R(D)
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