MESON Chess Problem Database

Problem Display
PID: 107990 (7K/7Q/8/p1RNp3/1p2PP2/3k1p2/r1N1pP2/qB2B3 w - - 0 1)

Dobbs, Gilbert S

Los Angeles Examiner, 1920

7K/7Q/8/p1RNp3/1p2PP2/3k1p2/r1N1pP2/qB2B3

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Scxb4#
    • 1...a4
      • 2.Sdxb4#
    • 1...exf4+
      • 2.e5#
  • Tries
    • 1.Sxa1+?
      • 1...Kd4
        • 2.Sb3#
      • 1...Rc2!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Qh7#
      • 1...Qxb1
        • 2.Sf6#
      • 1...Qc3
        • 2.Sxc3#
      • 1...Qd4
        • 2.Scxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);SBLOCK::B(A)+S(C),DCHECK,XP(f)
    • P(g);N_GUARD::S(H),XP(f)
    • P(h);CHECK,OGATE,XP(F)::QAB(I)+P(E)
  • Tries
    • Try
      • S(C);CHECK,XQ(a)
      • Vars
        • K(d);P-FLIGHT::S(C)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • Q(I);
    • Threat
      • QAR(I)+S(H)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XP(E)::QAB(I)
      • Q(a);N_GUARD,XB(A)::QAR(I)+S(H)
      • Q(a);::QAR(I)+S(H),XQ(a)
      • Q(a);SBLOCK::B(A)+S(C),DCHECK,XP(f)
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