MESON Chess Problem Database

Problem Display
PID: 150718 (5q2/3p1pr1/N1Nk4/1p3Pp1/8/5QK1/1p1P4/4R3 w - - 0 1)

Gold, Samuel

Pittsburgh Sun, 1921

(First published on Sat May 21 1921)

5q2/3p1pr1/N1Nk4/1p3Pp1/8/5QK1/1p1P4/4R3

#2

7 + 8

14868 Pirnie Collection 2014
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...dxc6
      • 2.Qd3#
  • Tries
    • 1.Scb4?
      • threat
        • 2.Qd5#
        • 2.Qd3#
      • 1...b1Q
        • 2.Qd5#
      • 1...b1B
        • 2.Qd5#
      • 1...Qa8!
    • 1.Sa5?
      • threat
        • 2.Sb7#
        • 2.Qd3#
      • 1...b1Q
        • 2.Sb7#
      • 1...b1B
        • 2.Sb7#
      • 1...Qb8
        • 2.Qd3#
      • 1...Qc8
        • 2.Qd3#
      • 1...Qa8!
    • 1.Sa7?
      • threat
        • 2.Sxb5#
        • 2.Qd3#
      • 1...b1B
        • 2.Sxb5#
      • 1...b1R
        • 2.Qd3#
      • 1...Qa8
        • 2.Sxb5#
      • 1...Qb8
        • 2.Qd3#
      • 1...b4
        • 2.Sb5#
        • 2.Qd3#
      • 1...b1Q!
    • 1.Sd8?
      • threat
        • 2.Sb7#
        • 2.Qd3#
      • 1...b1Q
        • 2.Sb7#
      • 1...b1B
        • 2.Sb7#
      • 1...Qxd8!
    • 1.Qc3?
      • threat
        • 2.Qc5#
      • 1...dxc6
        • 2.Qd4#
        • 2.Qd3#
      • 1...Kd5!
  • Keys
    • 1.Re4!
      • threat
        • 2.Rd4#
      • 1...Kd5
        • 2.Rd4#
      • 1...Kxc6
        • 2.Re6#
      • 1...dxc6
        • 2.Qd3#

This anticipates 202301(1921-1923)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);SBLOCK,XS(G)::QAR(C)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::QAR1(C)
      • Refutation
        • Q(h);
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::S(G)
        • Q(h);::QAR(C)
      • Refutation
        • Q(h);
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::S(G),XP(b)
        • P(a);::QAR(C)
        • Q(h);::S(G),XP(b)
        • Q(h);::QAR(C)
      • Refutation
        • P(a);
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);::S(G)
      • Refutation
        • Q(h);XS(G)
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • K(d);P-FLIGHT::QAB(C)+R(A),DCHECK
      • K(d);P-FLIGHT,XS(G)::QAB(C)+R(A),DCHECK
      • P(e);SBLOCK,XS(G)::QAR(C)
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