MESON Chess Problem Database

Problem Display
PID: 24885 (8/8/3Q3K/1N6/2p1p3/3B4/1P1k1P2/R7 w - - 0 1)

Klaar, Josef F

Oesterreichische Lesehalle, 1889

8/8/3Q3K/1N6/2p1p3/3B4/1P1k1P2/R7

#2

7 + 3

3360 Simple Two-move Themes 1924
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Qb4+?
      • 1...c3
        • 2.Qxc3#
      • 1...Kxd3!
    • 1.Qf4+?
      • 1...e3
        • 2.Qxe3#
      • 1...Kxd3!
  • Keys
    • 1.Sd4!
      • 1...Kxd3
        • 2.Rd1#
      • 1...cxd3
        • 2.Qb4#
      • 1...exd3
        • 2.Qf4#
      • 1...c3
        • 2.Sb3#
      • 1...e3
        • 2.Sf3#

This anticipates 175805(1898)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAB1(F),XP(b)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • Q(F);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(F),XP(c)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
  • Actual
    • S(E);
    • Vars
      • K(a);P-FLIGHT,XB(D)::R(A)
      • P(b);N_GUARD,SBLOCK,XB(D)::QAB(F)
      • P(c);N_GUARD,SBLOCK,XB(D)::QAB(F)
      • P(b);N_GUARD::S(E)
      • P(c);N_GUARD::S(E)
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