MESON Chess Problem Database

Problem Display
PID: 21648 (rR2qrk1/p3RN1N/4Q1KP/8/b3n3/5pp1/1B6/8 w - - 0 1)

Sheppard, Charles William

2nd Prize, Good Companions (March), 1920

rR2qrk1/p3RN1N/4Q1KP/8/b3n3/5pp1/1B6/8

#2

8 + 9

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Sfg5#
      • 2.Sd6#
      • 2.Sh8#
    • 1...Qc6
      • 2.Sd6#
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Rxf7
      • 2.Qxf7#
    • 1...Sd2
      • 2.Sf6#
    • 1...Sf2
      • 2.Sf6#
    • 1...Sc3
      • 2.Sf6#
    • 1...Sc5
      • 2.Sf6#
    • 1...Sg5
      • 2.Sf6#
    • 1...Sd6
      • 2.Sf6#
    • 1...Sf6
      • 2.Sxf6#
  • Tries
    • 1.Rexe8?
      • threat
        • 2.Sfg5#
        • 2.Sd6#
        • 2.Sd8#
        • 2.Sh8#
        • 2.Rxf8#
      • 1...Rxb8
        • 2.Sfg5#
        • 2.Sd6#
        • 2.Sd8#
        • 2.Sh8#
      • 1...Rxe8
        • 2.Sfg5#
        • 2.Sd6#
        • 2.Sh8#
      • 1...Bb3
        • 2.Rxf8#
      • 1...Bd7
        • 2.Rxf8#
      • 1...Sc3
        • 2.Sf6#
        • 2.Rxf8#
      • 1...Sc5
        • 2.Sf6#
        • 2.Rxf8#
      • 1...Sg5
        • 2.Sfxg5#
        • 2.Sf6#
        • 2.Rxf8#
      • 1...Sd6
        • 2.Sxd6#
        • 2.Sf6#
        • 2.Rxf8#
      • 1...Sf6
        • 2.Sxf6#
        • 2.Rxf8#
      • 1...Bxe8!
    • 1.Qf6?
      • threat
        • 2.Qg7#
        • 2.Qh8#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Rxf7
        • 2.Qh8#
        • 2.Qxf7#
      • 1...Sxf6
        • 2.Sxf6#
      • 1...Qc6!
  • Keys
    • 1.Kh5!
      • threat
        • 2.Qg6#
      • 1...Qb5+
        • 2.Sfg5#
      • 1...Qxf7+
        • 2.Qxf7#
      • 1...Sf6+
        • 2.Sxf6#
      • 1...Kxh7
        • 2.Qg6#
      • 1...Rxf7
        • 2.Qxf7#
      • 1...Qc6
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(g);N_PINS(F),P_PINQ(B),P_SPINR(h)::QAB(B)+S(F)
    • Q(g);CHECK,OGATE,P_SPINQ(g),P_SPINR(h),XS(F)::QAB1(B),XQ(g)
    • R(h);OGATE,P_SPINQ(g),P_SPINR(h),XS(F)::QAB1(B),XR(h)
    • S(d);N_GUARD::S(G)
    • S(d);N_GUARD::S(G),XS(d)
  • Tries
    • Try
      • R(E);N_SPINS(F),P_PINR(h),XQ(g)
      • Threat
        • DUALS(5)
      • Vars
        • B(c);::R1(E),XR(h)
      • Refutation
        • B(c);N_SPINR(h),P_PINS(F),XR(E)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);CHECK,OGATE,P_SPINR(h),XS(F)::QAB1(B),XQ(g)
        • S(d);XQ(B)::S(G),XS(d)
      • Refutation
        • Q(g);N_PINS(F),P_PINQ(B),P_SPINR(h)
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • QAR2(B)
    • Vars
      • Q(g);CHECK,N_PINS(F),P_SPINR(h)::QAB(B)+S(F)
      • Q(g);CHECK,OGATE,P_SPINQ(g),P_SPINR(h),XS(F)::QAB1(B),XQ(g)
      • S(d);CHECK,N_GUARD::S(G),XS(d)
      • K(i);S_FLIGHT,XS(G)::QAB1(B)
      • R(h);OGATE,P_SPINQ(g),P_SPINR(h),XS(F)::QAB1(B),XR(h)
      • Q(g);N_PINS(F),P_SPINR(h)::QAB(B)+S(F)
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