MESON Chess Problem Database

Problem Display
PID: 226463 (8/B1p5/B1Q5/1P6/1K4p1/7b/2P3N1/5k2 w - - 0 1)

Ferber, Eugene

Deutsche Schachzeitung, 1909

8/B1p5/B1Q5/1P6/1K4p1/7b/2P3N1/5k2

#2

7 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Qe4?
      • 1...c5+
        • 2.bxc5 ep#
      • 1...g3
        • 2.Qf3#
      • 1...c6
        • 2.bxc6#
      • 1...Bxg2!
  • Keys
    • 1.Qd5!
      • 1...c5+
        • 2.bxc5 ep#
      • 1...Ke2
        • 2.Qd3#
      • 1...Bxg2
        • 2.Qd1#
      • 1...g3
        • 2.Qf3#
      • 1...c6
        • 2.bxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(c);N_GUARD::QAR2(F)
  • Tries
    • Try
      • Q(F);
      • Vars
        • P(d);CHECK,OGATE::B(E)+P(D),XP(d),EP
        • P(c);N_GUARD::QAR2(F)
        • P(d);OGATE::B(E)+P(D),XP(d)
      • Refutation
        • B(b);XS(B)
  • Actual
    • Q(F);
    • Vars
      • P(d);CHECK,OGATE::B(E)+P(D),XP(d),EP
      • K(a);S_FLIGHT::QAB1(F)
      • B(b);SBLOCK,XS(B)::QAR2(F)
      • P(c);N_GUARD::QAR2(F)
      • P(d);OGATE::B(E)+P(D),XP(d)
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