MESON Chess Problem Database

Problem Display
PID: 129721 (3B4/p2rp3/k2bN3/1R1P4/bp6/1p6/1P6/6QK w - - 0 1)

Onitiu, Valerian

Deutsche Schachzeitung, 1898

3B4/p2rp3/k2bN3/1R1P4/bp6/1p6/1P6/6QK

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxb5
      • 2.Qf1#
    • 1...Rb7
      • 2.Ra5#
  • Tries
    • 1.Rb6+?
      • 1...axb6
        • 2.Qxb6#
      • 1...Ka5!
    • 1.Qa1?
      • threat
        • 2.Qxa4#
      • 1...Kxb5
        • 2.Qf1#
      • 1...Bc7!
  • Keys
    • 1.Qg6!
      • 1...Kxb5
        • 2.Qd3#
      • 1...Rxd8
        • 2.Sc7#
      • 1...Bxb5
        • 2.Sc5#
      • 1...Rb7
        • 2.Ra5#
      • 1...Rc7
        • 2.Sxc7#
      • 1...Bh2
        • 2.Sc7#
      • 1...Bg3
        • 2.Sc7#
      • 1...Bf4
        • 2.Sc7#
      • 1...Bc5
        • 2.Sc7#
      • 1...Be5
        • 2.Sc7#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Bb8
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • K(d);OGATEB,S_FLIGHT,XR(D)::QAB(A)
    • R(g);SBLOCK::R1(D)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(f);OGATE,XR(D)::QAR1(A),XP(f)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(A);P_PINB(b)
      • Threat
        • QAR2(A),XB(b)
      • Vars
        • K(d);N_SPINB(b),OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • Refutation
        • B(e);
  • Actual
    • Q(A);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • R(g);N_GUARD,XB(G)::S(F)
      • B(b);SBLOCK,XR(D)::S(F)
      • R(g);SBLOCK::R1(D)
      • R(g);N_GUARD::S(F),XR(g)
      • B(e);::QAR(A)+S(F),DCHECK
      • B(e);::QAR(A)+S(F),DCHECK,XB(e)
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Developed and maintained by Brian Stephenson.
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