MESON Chess Problem Database

Problem Display
PID: 244323 (2R5/2PPpP2/3RB3/1PNNk1p1/2P1P1Pp/B7/1P1p1Q2/3Kn3 w - - 0 1)

Jones, Christopher JAJ

The Problemist, 1989

2R5/2PPpP2/3RB3/1PNNk1p1/2P1P1Pp/B7/1P1p1Q2/3Kn3

#2

16 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qh2#
    • 1...exd6
      • 2.Qf6#
  • Tries
    • 1.Sb3?
      • threat
        • 2.Qd4#
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qe3#
        • 2.Qe2#
        • 2.Qf5#
      • 1...exd6
        • 2.Qf5#
      • 1...Sc2
        • 2.Qf5#
      • 1...Sf3!
    • 1.Sd3+?
      • 1...Kxe4
        • 2.Sc3#
        • 2.Bf5#
        • 2.Qe3#
      • 1...Sxd3!
    • 1.Sb4?
      • threat
        • 2.Rd5#
      • 1...Kxd6
        • 2.Qd4#
      • 1...exd6
        • 2.Sc6#
      • 1...Sf3!
    • 1.Qe3?
      • 1...Kxd6
        • 2.e5#
      • 1...exd6
        • 2.Qc3#
      • 1...Sc2
        • 2.Sd3#
      • 1...Sg2
        • 2.Sd3#
      • 1...Sd3
        • 2.Sxd3#
      • 1...Sf3
        • 2.Sd3#
      • 1...h3!
    • 1.Qg3+?
      • 1...Kd4
        • 2.Sxe7#
        • 2.Qc3#
      • 1...hxg3!
    • 1.Qd4+?
      • 1...Kxd6
        • 2.Sc3#
        • 2.Se3#
        • 2.Sb4#
        • 2.Sf4#
        • 2.Sb6#
        • 2.Sf6#
        • 2.e5#
        • 2.d8Q#
        • 2.d8R#
      • 1...Kxd4!
    • 1.Qf4+?
      • 1...Kd4
        • 2.Sxe7#
      • 1...gxf4!
    • 1.Qf5+?
      • 1...Kxd6
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.e5#
        • 2.d8Q#
        • 2.d8R#
      • 1...Kd4!
    • 1.Qf6+?
      • 1...Kxd6
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.e5#
        • 2.d8Q#
        • 2.d8R#
      • 1...exf6!
  • Keys
    • 1.Bf5!
      • threat
        • 2.Re6#
      • 1...Kxd6
        • 2.Sd3#
      • 1...exd6
        • 2.Re8#
      • 1...e6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);S_FLIGHT,XR(K)::QAB(C)
    • P(f);N_GUARD,SBLOCK,XR(K)::QAB1(C)
  • Tries
    • Try
      • S(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);XR(K)::QAR1(C)
        • S(a);::QAR1(C)
      • Refutation
        • S(a);
    • Try
      • S(I);CHECK
      • Refutation
        • S(a);XS(I)
    • Try
      • S(J);
      • Threat
        • R1(K)
      • Vars
        • K(d);S_FLIGHT,XR(K)::QAR2(C)
        • P(f);SBLOCK,XR(K)::S(J)
      • Refutation
        • S(a);
    • Try
      • Q(C);
      • Vars
        • K(d);OGATE,S_FLIGHT,XR(K)::P(F)
        • P(f);SBLOCK,XR(K)::QAB(C)
        • S(a);N_GUARD::S(I)
        • S(a);N_GUARD::S(I),XS(a)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Refutation
        • P(c);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);S_FLIGHT::R(K)+S(J),XP(f)
      • Refutation
        • P(e);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • P(f);XQ(C)
  • Actual
    • B(L);
    • Threat
      • R1(K)
    • Vars
      • K(d);S_FLIGHT,XR(K)::B(D)+S(I)
      • P(f);OGATEB,SBLOCK,XR(K)::R(P)
      • P(f);::R1(K),XP(f)
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