MESON Chess Problem Database

Problem Display
PID: 150337 (5QK1/4R3/3Bp1p1/1Pbk4/rpN3R1/qr6/4Pp2/8 w - - 0 1)

Dawson, Thomas Rayner

Pittsburgh Post, 1924

(First published on Sun Aug 3 1924)

5QK1/4R3/3Bp1p1/1Pbk4/rpN3R1/qr6/4Pp2/8

#2

8 + 9

15256 TRD Scrapbook 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qf3#
    • 1...Ba7
      • 2.Qa8#
    • 1...e5
      • 2.Rxe5#
      • 2.Qf7#
  • Tries
    • 1.Qf5+?
      • 1...exf5
        • 2.Re5#
      • 1...e5
        • 2.Rxe5#
        • 2.Qe4#
        • 2.Qe6#
        • 2.Qxe5#
        • 2.Qf7#
      • 1...gxf5!
    • 1.Qc8?
      • threat
        • 2.Qxe6#
        • 2.Qb7#
        • 2.Qxc5#
        • 2.Qc6#
      • 1...Bxd6
        • 2.Qc6#
      • 1...Re3
        • 2.Qb7#
        • 2.Qxc5#
        • 2.Qc6#
      • 1...Ra6
        • 2.Qxe6#
        • 2.Qxc5#
      • 1...Ra7
        • 2.Qxe6#
        • 2.Qxc5#
        • 2.Qc6#
      • 1...Be3
        • 2.Qxe6#
        • 2.Qb7#
        • 2.Qc6#
      • 1...Bd4
        • 2.Qxe6#
        • 2.Qc6#
        • 2.e4#
      • 1...Bb6
        • 2.Qxe6#
        • 2.Qb7#
        • 2.Qc6#
      • 1...Ba7
        • 2.Qxe6#
        • 2.Qb7#
        • 2.Qc6#
        • 2.Qa8#
      • 1...e5
        • 2.Rxe5#
        • 2.Qe6#
        • 2.Qb7#
        • 2.Qxc5#
        • 2.Qc6#
      • 1...Ra8!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Rxc5#
      • 1...Bxd6
        • 2.Qxd6#
      • 1...e5
        • 2.Qf7#
      • 1...Be3
        • 2.Qf3#
      • 1...Bd4
        • 2.e4#
      • 1...Bb6
        • 2.Sxb6#
      • 1...Ba7
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(f);S_CUTR(c)::QAB(G)
    • B(f);S_CUTR(d)::QAB(G)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • P(h);OGATE,XQ(G)::R1(F)
      • Refutation
        • P(i);XQ(G)
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • B(f);XB(E)::QAB1(G)
      • Refutation
        • R(d);P_PINQ(G)
  • Actual
    • R(F);
    • Threat
      • R1(F),XB(f)
    • Vars
      • B(f);OGATE,XB(E)::QAR1(G),XB(f)
      • P(h);OGATEB::QAB(G)
      • B(f);S_CUTR(c)::QAB(G)
      • B(f);SBLOCK::P(A)
      • B(f);N_GUARD::S(B),XB(f)
      • B(f);S_CUTR(d)::QAB(G)
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