MESON Chess Problem Database

Problem Display
PID: 160593 (6n1/1p4n1/b2Rr1P1/2P1k3/1pp5/1P2NKRB/8/4Q3 w - - 0 1)

MacKay, Donald

4th Prize, Hampstead and Highgate Express, 1903

6n1/1p4n1/b2Rr1P1/2P1k3/1pp5/1P2NKRB/8/4Q3

#2

9 + 8

14986 White-Hume Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Sd5#
    • 1...Rf6+
      • 2.Sf5#
    • 1...Rxg6
      • 2.Sd1#
      • 2.Sf1#
      • 2.Sc2#
      • 2.Sg2#
      • 2.Sxc4#
      • 2.Sf5#
    • 1...Re7
      • 2.Sd1#
      • 2.Sf1#
      • 2.Sc2#
      • 2.Sg2#
      • 2.Sxc4#
      • 2.Sf5#
    • 1...Re8
      • 2.Sd1#
      • 2.Sf1#
      • 2.Sc2#
      • 2.Sg2#
      • 2.Sxc4#
      • 2.Sf5#
    • 1...Sf5
      • 2.Sg4#
    • 1...Sf6
      • 2.Sxc4#
  • Tries
    • 1.Bxe6?
      • threat
        • 2.Sg4#
      • 1...Kf6
        • 2.Sd5#
      • 1...Sxe6!
    • 1.Rg5+?
      • 1...Sf5
        • 2.Sg4#
        • 2.Rxf5#
      • 1...Kf6!
    • 1.bxc4?
      • threat
        • 2.Qa1#
      • 1...Rf6+
        • 2.Sf5#
      • 1...Kf6
        • 2.Sd5#
      • 1...Sf5
        • 2.Sg4#
      • 1...b3
        • 2.Qc3#
      • 1...Rxd6!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Sd5#
      • 1...Rf6+
        • 2.Sf5#
      • 1...Kf6
        • 2.Sd5#
      • 1...cxd3
        • 2.Qa1#
      • 1...Sf5
        • 2.Sg4#
      • 1...Sf6
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);P_SPINR(e),S_FLIGHT::S(C)
    • R(e);CHECK::QAR(A)+S(C)
    • S(g);SBLOCK::QAR(A)+S(C),DCHECK
    • S(h);SBLOCK::QAR(A)+S(C),DCHECK,XP(b)
  • Tries
    • Try
      • B(F);XR(e)
      • Threat
        • QAR(A)+S(C),DCHECK
      • Vars
        • K(c);S_FLIGHT::S(C)
      • Refutation
        • S(g);XB(F)
    • Try
      • R(E);CHECK
      • Refutation
        • K(c);P_SPINR(e),S_FLIGHT
    • Try
      • P(B);XP(b)
      • Threat
        • QAB(A)
      • Vars
        • R(e);CHECK::QAR(A)+S(C)
        • K(c);P_SPINR(e),S_FLIGHT::S(C)
        • S(g);SBLOCK::QAR(A)+S(C),DCHECK
        • P(a);N_GUARD::QAB(A)
      • Refutation
        • R(e);XR(H)
  • Actual
    • R(H);
    • Threat
      • QAR(A)+S(C)
    • Vars
      • R(e);CHECK,SBLOCK::QAR(A)+S(C)
      • K(c);S_FLIGHT::S(C)
      • P(b);N_GUARD,XR(H)::QAB(A)
      • S(g);SBLOCK::QAR(A)+S(C),DCHECK
      • S(h);SBLOCK::QAR(A)+S(C),DCHECK,XP(b)
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