MESON Chess Problem Database

Problem Display
PID: 147266 (r3k1N1/1R4Kp/p1P3nP/RB2n1Q1/8/8/8/8 w q - 0 1)

Dawson, Thomas Rayner

Yorkshire Weekly Post, 1909

(First published on Sat Jan 23 1909)

r3k1N1/1R4Kp/p1P3nP/RB2n1Q1/8/8/8/8

#2

8 + 6

15256 TRD Scrapbook 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Rxb8#
    • 1...Rd8
      • 2.Sf6#
    • 1...Sxc6
      • 2.Bxc6#
    • 1...Sd7
      • 2.cxd7#
    • 1...Sf4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...Sf8
      • 2.Qe7#
    • 1...Sh8
      • 2.Qe7#
    • 1...axb5
      • 2.Rxa8#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Sf6#
      • 1...Sxd7
        • 2.cxd7#
      • 1...Sg4!
    • 1.Re7+?
      • 1...Sxe7
        • 2.Qxe7#
      • 1...Kd8!
    • 1.Qd2?
      • threat
        • 2.Sf6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sg4
        • 2.Qd7#
      • 1...Sd3!
    • 1.Qd8+?
      • 1...Rxd8
        • 2.Sf6#
      • 1...Kxd8!
  • Keys
    • 1.Qf5!
      • 1...Kd8
        • 2.c7#
      • 1...Sxc6
        • 2.Qd7#
      • 1...axb5
        • 2.Rxa8#
      • 1...Ra7
        • 2.Qc8#
      • 1...Rb8
        • 2.Rxb8#
      • 1...Rc8
        • 2.Qxc8#
      • 1...Rd8
        • 2.Sf6#
      • 1...Sd3
        • 2.Qd7#
      • 1...Sf3
        • 2.Qd7#
      • 1...Sc4
        • 2.Qd7#
      • 1...Sg4
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Sf7
        • 2.Qd7#
      • 1...Sf4
        • 2.Qf8#
      • 1...Sh4
        • 2.Qf8#
      • 1...Se7
        • 2.Qf8#
      • 1...Sf8
        • 2.Qxf8#
      • 1...Sh8
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 7
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(e);N_GUARD::R(F),XR(e)
    • R(e);SBLOCK::S(H)
    • S(a);OGATE,P_SPINS(a),XP(D)::B(B),XS(a)
    • S(a);OGATE::P(D),XS(a)
    • S(c);N_GUARD::QAR1(C)
    • S(c);N_GUARD::QAR1(C),XS(c)
    • P(b);OGATE,XB(B)::R(A),XR(e)
  • Tries
    • Try
      • R(F);
      • Threat
        • S(H)
      • Vars
        • S(a);OGATE,XR(F)::P(D),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(F);CHECK
      • Vars
        • S(c);OGATE,XR(F)::QAR1(C),XS(c)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(H)
      • Vars
        • S(a);N_GUARD::QAB1(C),XS(a)
        • S(a);N_GUARD::QAB1(C)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Vars
        • R(e);SBLOCK,XQ(C)::S(H)
      • Refutation
        • K(f);P-FLIGHT,XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(f);P-FLIGHT::P(D)
      • S(a);N_GUARD,P_SPINS(a),XP(D)::QAB1(C)
      • P(b);OGATE,XB(B)::R(A),XR(e)
      • R(e);N_GUARD,P_PINR(F)::QAR2(C)
      • R(e);N_GUARD::R(F),XR(e)
      • R(e);N_GUARD::QAR2(C),XR(e)
      • R(e);SBLOCK::S(H)
      • S(a);N_GUARD::QAB1(C)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(c);N_GUARD::QAR1(C)
      • S(c);N_GUARD::QAR1(C),XS(c)
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