MESON Chess Problem Database

Problem Display
PID: 41482 (3r4/2BR4/3b1Qq1/1K3nR1/4k3/3n1p2/3PP3/5N2 w - - 0 1)

Wurzburg, Otto

Source?, 0000

3r4/2BR4/3b1Qq1/1K3nR1/4k3/3n1p2/3PP3/5N2

#2

8 + 7

3360 Simple Two-move Themes 1924
20 De Problemist 1930
133 The Problemist Supplement 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.exd3#
    • 1...Ba3
      • 2.exd3#
    • 1...Bg3
      • 2.exd3#
    • 1...Bb4
      • 2.exd3#
    • 1...Bf4
      • 2.exd3#
    • 1...Bc5
      • 2.exd3#
    • 1...Be7
      • 2.exd3#
    • 1...Bf8
      • 2.exd3#
    • 1...Se3
      • 2.exf3#
    • 1...Sg3
      • 2.exf3#
    • 1...Sh6
      • 2.exf3#
    • 1...Se7
      • 2.exf3#
    • 1...Sg7
      • 2.exf3#
  • Tries
    • 1.Qxf5+?
      • 1...Kd4
        • 2.Qd5#
        • 2.e3#
      • 1...Qxf5+!
    • 1.exd3+?
      • 1...Kf4
        • 2.Bxd6#
      • 1...Kd5
        • 2.Se3#
      • 1...Kxd3!
  • Keys
    • 1.Sg3+!
      • 1...Kf4
        • 2.e3#
      • 1...Kd5
        • 2.e4#
      • 1...Bxg3
        • 2.exd3#
      • 1...Sxg3
        • 2.exf3#

This is after 2795

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • B(e);::P(C),XS(a)
    • S(d);::P(C),XP(b)
  • Tries
    • Try
      • Q(F);CHECK,XS(d)
      • Refutation
        • Q(f);CHECK,XQ(F)
    • Try
      • P(C);CHECK,XS(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINB(e),P_SPINS(d)::B(G),XB(e)
        • K(c);P_SPINB(e),P_SPINS(d),S_FLIGHT::S(A)
      • Refutation
        • K(c);P_SPINB(e),S_FLIGHT,XP(C)
  • Actual
    • S(A);CHECK
    • Vars
      • K(c);P-FLIGHT,P_SPINB(e),P_SPINS(d)::P(C)
      • K(c);OGATE,P_SPINB(e),P_SPINS(d),S_FLIGHT::P(C)
      • B(e);XS(A)::P(C),XS(a)
      • S(d);XS(A)::P(C),XP(b)
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