MESON Chess Problem Database

Problem Display
PID: 139818 (k3N2R/1nB4Q/1P6/4KP2/N7/4P3/6r1/R7 w - - 0 1)

Dobbs, Gilbert S

The Problemist, 1937

k3N2R/1nB4Q/1P6/4KP2/N7/4P3/6r1/R7

#2

10 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Sc5+?
      • 1...Sa5
        • 2.Sg7#
        • 2.Rxa5#
      • 1...Ra2!
    • 1.Sd6+?
      • 1...Sd8
        • 2.Sb2#
        • 2.Rxd8#
      • 1...Rg8!
    • 1.Bd6?
      • threat
        • 2.Sc7#
      • 1...Sxd6
        • 2.Qa7#
      • 1...Sa5
        • 2.Qa7#
      • 1...Sc5
        • 2.Qa7#
      • 1...Sd8
        • 2.Sb2#
        • 2.Qa7#
      • 1...Rg8!
  • Keys
    • 1.Qh1!
      • 1...Sa5
        • 2.Sd6#
      • 1...Sc5
        • 2.Sxc5#
        • 2.Sd6#
      • 1...Sd6
        • 2.Sc5#
        • 2.Sxd6#
      • 1...Sd8
        • 2.Sc5#
      • 1...Rg8
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
      • 1...Rg1
        • 2.Sg7#
      • 1...Ra2
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rb2
        • 2.Sxb2#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rc2
        • 2.Sb2#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rd2
        • 2.Sb2#
        • 2.Sd6#
      • 1...Re2
        • 2.Sb2#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rf2
        • 2.Sb2#
        • 2.Sd6#
        • 2.Sf6#
        • 2.Sg7#
      • 1...Rh2
        • 2.Sb2#
      • 1...Rg3
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sg7#
      • 1...Rg4
        • 2.Sg7#
      • 1...Rg5
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sg7#
      • 1...Rg6
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sg7#
      • 1...Rg7
        • 2.Sb2#
        • 2.Sc3#
        • 2.Sc5#
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • S(I);CHECK
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • B(G);
      • Threat
        • R(J)+S(I),DCHECK
      • Vars
        • S(b);OGATE,XB(G)::QAR1(H)
        • S(b);OGATE::QAR1(H)
      • Refutation
        • R(a);
  • Actual
    • Q(H);
    • Vars
      • S(b);N_GUARD,P_SPINR(a)::R(J)+S(I)
      • S(b);N_GUARD,P_SPINR(a)::R(A)+S(C)
      • R(a);P_SPINS(b)::R(J)+S(I)
      • R(a);P_SPINS(b)::R(A)+S(C)
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