MESON Chess Problem Database

Problem Display
PID: 1962 (8/5n2/8/Q5N1/5kp1/1R6/8/2K5 w - - 0 1)

Loyd, Sam

The Gambit, 1859

8/5n2/8/Q5N1/5kp1/1R6/8/2K5

#2

4 + 3

302 Schachzeitung 1860
1679 American Chess Nuts 1868
5206 Sam Loyd and His Chess Problems 1913
2786 More Fun with Chess Miniatures 2000
5626 European Junior Chess Solving Championship 2003
5405 Chess Solving Yearbook 2003 2004
3713 Snap 2009
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sxf7?
      • threat
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...g3!
  • Keys
    • 1.Re3!
      • 1...Kxe3
        • 2.Qd2#
      • 1...Sxg5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...g3
        • 2.Re4#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...Sd8
        • 2.Qe5#
      • 1...Sh8
        • 2.Qe5#

This anticipates 224218(1887), 121007(1899), 205348(1949), 153953(1952)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);XS(c)
      • Threat
        • QAB1(C)
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • R(B);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XR(B)::QAB1(C)
      • S(c);N_GUARD,XS(D)::QAB1(C)
      • S(c);N_GUARD::QAB1(C),XS(c)
      • P(b);SBLOCK::R1(B)
      • S(c);N_GUARD::QAB1(C)
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