MESON Chess Problem Database

Problem Display
PID: 57540 (2R5/1p6/b4p2/r2kpQ2/2N2B2/q2N3K/8/3R1n2 w - - 0 1)

Dobbs, Gilbert S

The Chess Review, 1936

2R5/1p6/b4p2/r2kpQ2/2N2B2/q2N3K/8/3R1n2

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sb4#
    • 1...Qb2
      • 2.Sb4#
    • 1...Qb4
      • 2.Sxb4#
    • 1...Qd6
      • 2.Sb4#
    • 1...Qe7
      • 2.Sb4#
    • 1...Qf8
      • 2.Sb4#
    • 1...Qa1
      • 2.Sb4#
    • 1...Qa2
      • 2.Sb4#
    • 1...Qxd3+
      • 2.Rxd3#
    • 1...Qa4
      • 2.Sb4#
    • 1...Se3
      • 2.Sb4#
    • 1...Sg3
      • 2.Sb4#
  • Tries
    • 1.Sb6+?
      • 1...Kd6
        • 2.Qd7#
        • 2.Qxf6#
      • 1...Kd4!
  • Keys
    • 1.Sxe5!
      • threat
        • 2.Sf3#
      • 1...Kd4
        • 2.Sf3#
      • 1...Kd6
        • 2.Qd7#
      • 1...fxe5
        • 2.Qxe5#
      • 1...Qb2
        • 2.Sb4#
        • 2.Rd8#
      • 1...Qc5
        • 2.Sb4#
      • 1...Qd6
        • 2.Sb4#
      • 1...Qe7
        • 2.Sb4#
      • 1...Qa1
        • 2.Sb4#
        • 2.Rd8#
      • 1...Qc3
        • 2.Rd8#
      • 1...Rc5
        • 2.Rd8#
      • 1...Se3
        • 2.Sb4#
      • 1...Sg3
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_PINS(B)::R(A)+S(B),DCHECK
    • Q(b);N_PINS(B)::R(A)+S(B),DCHECK,XQ(b)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(B)::R(A),XQ(b)
    • S(a);N_PINS(B)::R(A)+S(B),DCHECK
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT
  • Actual
    • S(D);XP(e)
    • Threat
      • QAR(F)+S(D)
    • Vars
      • K(d);P-FLIGHT::S(D)
      • K(d);P-FLIGHT::QAR1(F)
      • P(g);OGATE,P_SPINP(g),XS(D)::QAR1(F),XP(g)
      • Q(b);N_PINS(B)::R(A)+S(B),DCHECK
      • Q(b);N_PINS(B),SBLOCK::R(A)+S(B),DCHECK
      • Q(b);N_GUARD::R(G)
      • R(c);S_CUTQ(b)::R(G)
      • S(a);N_PINS(B)::R(A)+S(B),DCHECK
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