MESON Chess Problem Database

Problem Display
PID: 134385 (7B/2pNR3/1pB5/bP1n4/pkn4R/p3pQ2/P3p3/4K3 w - - 0 1)

Boitmanis, Andris

Shakhmaty, 1978

7B/2pNR3/1pB5/bP1n4/pkn4R/p3pQ2/P3p3/4K3

#2

9 + 10

14475 Mat Plus Review 2007

SOLUTION

  • SOUND
  • Tries
    • 1.Rxe3?
      • 1...Sxe3
        • 2.Qf8#
      • 1...Sc3
        • 2.Bxc3#
        • 2.Qf8#
      • 1...Sf4
        • 2.Bc3#
      • 1...Se7
        • 2.Bc3#
      • 1...Sf6!
    • 1.Qe4?
      • threat
        • 2.Qb1#
        • 2.Qxc4#
      • 1...Sf6
        • 2.Qxc4#
      • 1...Sc3
        • 2.Qxc4#
      • 1...Sf4!
    • 1.Qxe3?
      • 1...Sxe7
        • 2.Bc3#
        • 2.Qd2#
        • 2.Qc3#
        • 2.Qxe7#
      • 1...Sf4
        • 2.Bc3#
        • 2.Qc3#
      • 1...Sc3
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...Sf6
        • 2.Qd2#
      • 1...Sxe3!
    • 1.Qf6?
      • 1...Sxe7
        • 2.Qc3#
        • 2.Qxe7#
      • 1...Sf4
        • 2.Qc3#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sxf6!
    • 1.Qf7?
      • 1...Sxe7
        • 2.Rxc4#
        • 2.Qxc4#
        • 2.Qxe7#
      • 1...Sf6
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sc3
        • 2.Rxc4#
        • 2.Qxc4#
      • 1...Sf4!
  • Keys
    • 1.Qf8!
      • 1...Sxe7
        • 2.Qxe7#
      • 1...Sf6
        • 2.Rxe3#
      • 1...Sf4
        • 2.Re4#
      • 1...Sc3
        • 2.Rxe3#
        • 2.Ree4#
        • 2.Re5#
        • 2.Re6#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Reh7#
        • 2.Re8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(H);XP(c)
      • Vars
        • S(h);N_GUARD,XR(H)::QAB(C)
        • S(h);N_GUARD,N_SPINS(f)::B(I)
        • S(h);N_GUARD::B(I)
      • Refutation
        • S(h);
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);::QAR1(C),XS(f)
      • Refutation
        • S(h);
    • Try
      • Q(C);XP(c)
      • Vars
        • S(h);N_GUARD::QAB(C)
      • Refutation
        • S(h);XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(h);N_GUARD,N_SPINS(f)::QAB1(C)
        • S(h);N_GUARD::QAB1(C),XS(h)
      • Refutation
        • S(h);XQ(C)
    • Try
      • Q(C);
      • Refutation
        • S(h);N_SPINS(f)
  • Actual
    • Q(C);
    • Vars
      • S(h);OGATE,XR(H)::QAB(C),XS(h)
      • S(h);N_GUARD::QAB(C)+R(H),XP(c)
      • S(h);N_GUARD,N_SPINS(f)::QAB(C)+R(H)
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