MESON Chess Problem Database

Problem Display
PID: 165109 (8/BB6/2r1p3/2NkN3/3P2p1/1P1n4/1P1QR3/5K2 w - - 0 1)

Hermanson, Halvar

Novi Temi, 1981

8/BB6/2r1p3/2NkN3/3P2p1/1P1n4/1P1QR3/5K2

#2

10 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qxd3#
    • 1...Sxc5
      • 2.dxc5#
    • 1...Sxe5
      • 2.dxe5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Bxc6#
      • 1...Sxe5
        • 2.Qa5#
      • 1...Sb4!
    • 1.Bxc6+?
      • 1...Kxd4
        • 2.Scxd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sxe6#
        • 2.Sb7#
        • 2.Scd7#
        • 2.Re4#
        • 2.Qc3#
        • 2.Qe3#
        • 2.Qxd3#
      • 1...Kd6!
    • 1.Qg5?
      • threat
        • 2.Qd8#
      • 1...Kxd4
        • 2.Sxc6#
      • 1...Kd6
        • 2.Qd8#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sxc5!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qd8#
      • 1...Kxd4
        • 2.Sxe6#
      • 1...Kd6
        • 2.Qd8#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sxe5
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINR(d),OGATEB,P-FLIGHT,P_SPINS(a),XP(F)::QAR1(C),XS(a)
    • S(a);OGATE,XS(G)::QAR(C)+P(F),XS(a)
    • S(a);OGATE,XS(H)::QAR(C)+P(F),XS(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • B(J),XR(d)
      • Vars
        • S(a);N_GUARD,XS(H)::QAR(C)
      • Refutation
        • S(a);
    • Try
      • B(J);CHECK,XR(d)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAR(C)
      • Vars
        • K(c);N_SPINR(d),P-FLIGHT,XP(F)::S(H),XR(d)
        • K(c);N_SPINR(d),P-FLIGHT::QAR2(C)
        • S(a);OGATE,P_SPINS(a),XS(H)::QAR1(C),XS(a)
      • Refutation
        • S(a);XS(G)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • K(c);N_SPINR(d),P-FLIGHT,XP(F)::B(I)+S(G),DCHECK,XP(e)
      • K(c);N_SPINR(d),P-FLIGHT::QAR2(C)
      • S(a);OGATE,P_SPINS(a),XS(G)::QAR1(C),XS(a)
      • S(a);N_GUARD,XS(H)::QAR(C)+S(G)
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