MESON Chess Problem Database

Problem Display
PID: 55183 (1Nn1r3/2RPkp1K/2P5/4p1p1/3N1r2/5Q2/5B2/8 w - - 0 1)

Stojnic, Dragan

The Problemist, 2004

1Nn1r3/2RPkp1K/2P5/4p1p1/3N1r2/5Q2/5B2/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.dxe8S#
    • 1...Kd8
      • 2.dxc8Q#
      • 2.dxc8R#
  • Tries
    • 1.Qa3+?
      • 1...Kf6
        • 2.dxe8S#
      • 1...Kd8
        • 2.Rxc8#
        • 2.dxc8Q#
        • 2.dxc8R#
      • 1...Sd6!
    • 1.dxc8Q+?
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf8
        • 2.Qa3#
      • 1...Kf6!
    • 1.dxc8S+?
      • 1...Kf6
        • 2.Sd7#
      • 1...Kf8
        • 2.Sd7#
      • 1...Kd8!
    • 1.dxe8Q+?
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf6
        • 2.Sd7#
        • 2.Rxf7#
        • 2.Qxf7#
        • 2.Qh8#
      • 1...Kxe8!
    • 1.dxe8R+?
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf6
        • 2.Sd7#
      • 1...Kxe8!
    • 1.d8S+?
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf6
        • 2.Rxf7#
      • 1...Kxd8
        • 2.Rd7#
      • 1...Kf8!
    • 1.d8B+?
      • 1...Kxd8
        • 2.Rd7#
      • 1...Kf8
        • 2.Sd7#
      • 1...Kd6!
  • Keys
    • 1.d8Q+!
      • 1...Kxd8
        • 2.Rd7#
      • 1...Kf8
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);P_SPINR(a),S_FLIGHT::PXR(g)=S
    • K(d);S_FLIGHT::PXS(f)=Q
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);S_FLIGHT::PXR(g)=S
      • Refutation
        • S(f);P_SPINS(f)
    • Try
      • P(F);CHECK,XS(f)
      • Vars
        • K(d);S_FLIGHT::S(C)
        • K(d);P_SPINR(g),S_FLIGHT::QAB(B)
      • Refutation
        • K(d);P_SPINR(a),S_FLIGHT
    • Try
      • P(F);CHECK,XS(f)
      • Vars
        • K(d);P_SPINR(a),S_FLIGHT::S(H)
        • K(d);S_FLIGHT::S(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(F);CHECK,XR(g)
      • Vars
        • K(d);S_FLIGHT::S(C)
      • Refutation
        • K(d);P-FLIGHT,XQ(F)
    • Try
      • P(F);CHECK,XR(g)
      • Vars
        • K(d);S_FLIGHT::S(C)
        • K(d);P_SPINR(a),S_FLIGHT::S(H)
      • Refutation
        • K(d);P-FLIGHT,XR(F)
    • Try
      • P(F);CHECK
      • Vars
        • K(d);S_FLIGHT::S(C)
        • K(d);OGATE,P_SPINR(a),S_FLIGHT::R1(E),XP(e)
        • K(d);S_FLIGHT,XS(F)::R1(E)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(F);CHECK
      • Vars
        • K(d);S_FLIGHT,XB(F)::R1(E)
        • K(d);S_FLIGHT::S(H)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • P(F);CHECK
    • Vars
      • K(d);S_FLIGHT,XQ(F)::R1(E)
      • K(d);P_SPINR(g),S_FLIGHT::S(H)
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