MESON Chess Problem Database

Problem Display
PID: 4590 (Q7/8/4p3/1p1N4/1PN1k1pP/2K5/6P1/8 w - - 0 1)

af Geyersstam, Fredrik

The Chess Monthly (Hoffer), 1881

Q7/8/4p3/1p1N4/1PN1k1pP/2K5/6P1/8

#2

7 + 4

3360 Simple Two-move Themes 1924
3310 2345 Chess Problems 1997
5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.Sd6#
  • Tries
    • 1.Qe8?
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qa8#
      • 1...e5
        • 2.Qxe5#
      • 1...Kf5!
    • 1.Qh8?
      • threat
        • 2.Qe5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Kf5
        • 2.Qh7#
      • 1...e5
        • 2.Qxe5#
      • 1...bxc4!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qxe6#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Kf5
        • 2.Qh7#
      • 1...exd5
        • 2.Qxg4#
      • 1...e5
        • 2.Sd6#

This anticipates 9440(1889), 78391(2004)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::S(D)
  • Tries
    • Try
      • Q(G);P_PINP(d)
      • Threat
        • QAR2(G),XP(d)
      • Vars
        • K(a);N_SPINP(d),OGATEB,S_FLIGHT,XS(F)::QAB(G)
        • P(d);OGATE::QAR1(G),XP(d)
      • Refutation
        • K(a);N_SPINP(d),S_FLIGHT
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • K(a);OGATEB,S_FLIGHT,XS(F)::QAB(G)
        • K(a);S_FLIGHT::QAB(G)
        • P(d);::QAR1(G),XP(d)
      • Refutation
        • P(c);XS(D)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G),XP(d)
    • Vars
      • K(a);OGATEB,P_SPINP(d),S_FLIGHT,XS(F)::QAB(G)
      • K(a);S_FLIGHT::QAB(G)
      • P(d);SBLOCK,XS(F)::QAR2(G),XP(b)
      • P(d);SBLOCK::S(D)
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