MESON Chess Problem Database

Problem Display
PID: 248850 (r3kr2/1p4P1/pP3pp1/2N1N2P/3K3B/8/4Q3/4R3 w q - 0 1)

Anonymous

Tidskrift for Schack, 1917

r3kr2/1p4P1/pP3pp1/2N1N2P/3K3B/8/4Q3/4R3

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8
      • 2.gxf8Q#
  • Tries
    • 1.Sed3+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Sf3+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Sc4+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Sg4+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Sxg6+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Sed7+?
      • 1...Kd8
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Kf7!
    • 1.Qb5+?
      • 1...Ke7
        • 2.Qd7#
      • 1...Kd8
        • 2.Qd7#
        • 2.gxf8Q#
      • 1...axb5!
    • 1.Qa2?
      • threat
        • 2.Sc6#
        • 2.Sf7#
      • 1...Rd8+
        • 2.Sed7#
      • 1...fxe5+
        • 2.Rxe5#
      • 1...Ke7
        • 2.Sf7#
      • 1...Kd8
        • 2.gxf8Q#
      • 1...Rf7
        • 2.Sxf7#
      • 1...0-0-0+!
    • 1.hxg6?
      • threat
        • 2.Sc6#
        • 2.Sf7#
      • 1...Rd8+
        • 2.Sed7#
      • 1...fxe5+
        • 2.Qxe5#
      • 1...Ke7
        • 2.Sf7#
      • 1...Kd8
        • 2.gxf8Q#
      • 1...Rf7
        • 2.Sxf7#
      • 1...0-0-0+!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Sc6#
        • 2.Sf7#
      • 1...Rd8+
        • 2.Sed7#
      • 1...fxe5+
        • 2.Rxe5#
      • 1...0-0-0+
        • 2.Scd7#
      • 1...Ke7
        • 2.Sf7#
      • 1...Kd8
        • 2.gxf8Q#
      • 1...Rf7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK,XP(c)
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);P-FLIGHT,P_SPINP(b)::QAR1(B)
      • Refutation
        • P(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,SBLOCK::R(A)+S(F)
        • P(b);CHECK,OGATE,P_SPINP(b),XS(F)::R(A),XP(b)
        • K(f);P-FLIGHT,P_SPINP(b)::R(A)+S(F)
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
        • R(g);::R(A)+S(F),XR(g)
      • Refutation
        • K(f);0-0-0,CHECK
    • Try
      • P(G);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,SBLOCK::QAR(B)+S(F)
        • P(b);CHECK,OGATE,P_SPINP(b),XS(F)::QAR(B),XP(b)
        • K(f);P-FLIGHT,P_SPINP(b)::QAR(B)+S(F)
        • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
        • R(g);::QAR(B)+S(F),XR(g)
      • Refutation
        • K(f);0-0-0,CHECK
  • Actual
    • Q(B);
    • Threat
      • DUALS(2)
    • Vars
      • R(e);CHECK,SBLOCK::R(A)+S(F)
      • P(b);CHECK,OGATE,P_SPINP(b),XS(F)::R(A),XP(b)
      • K(f);0-0-0,CHECK::QAR(B)+S(E)
      • K(f);P-FLIGHT,P_SPINP(b)::R(A)+S(F)
      • K(f);P-FLIGHT,P_SPINP(b)::PXR(g)=Q
      • R(g);::R(A)+S(F),XR(g)
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