MESON Chess Problem Database

Problem Display
PID: 11620 (1rrq4/8/1Q6/pN6/kN3BRp/PR3p2/P3b2K/1n1B4 w - - 0 1)

Haring, Jacobus

2nd Place, Hungarian Chess Federation, 1970

1rrq4/8/1Q6/pN6/kN3BRp/PR3p2/P3b2K/1n1B4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...axb4
      • 2.Rxb4#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sb2#
        • 2.Rb4#
      • 1...Qxd3
        • 2.Rb4#
      • 1...Bxd1
        • 2.Sb2#
      • 1...Bxd3
        • 2.Rb4#
      • 1...Qf6
        • 2.Rb4#
      • 1...Qd4
        • 2.Rb4#
      • 1...Qh8
        • 2.Rb4#
      • 1...Rc2!
    • 1.Sd5?
      • threat
        • 2.Rb4#
      • 1...Bxd1
        • 2.Bc7#
      • 1...Bxb5
        • 2.Rc3#
      • 1...Rc2!
    • 1.Rd3+?
      • 1...Rc2
        • 2.Bxc2#
      • 1...Bxd1!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Rb4#
      • 1...Qxd1
        • 2.Qxa5#
      • 1...Bxd1
        • 2.Bd6#
      • 1...Bxb5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(f);OGATE,XS(F)::B(A)+R(E),DCHECK,XP(f)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);XS(F)::B(A)+R(E),DCHECK
        • B(b);XB(A)::S(F)
        • B(b);XS(F)::B(A)+R(E),DCHECK
        • Q(i);::B(A)+R(E),DCHECK
      • Refutation
        • R(h);
    • Try
      • S(F);
      • Threat
        • B(A)+R(E),DCHECK
      • Vars
        • B(b);N_GUARD,XB(A)::R(H)+B(G)
        • B(b);N_GUARD,XS(I)::B(A)+R(E)
      • Refutation
        • R(h);
    • Try
      • R(E);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::B(A),XR(h)
      • Refutation
        • B(b);XB(A)
  • Actual
    • S(F);
    • Threat
      • B(A)+R(E),DCHECK
    • Vars
      • Q(i);N_GUARD,XB(A)::QAR1(J),XP(f)
      • B(b);N_GUARD,XB(A)::R(H)+B(G)
      • B(b);N_GUARD,XS(I)::B(A)+R(E)
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