MESON Chess Problem Database

Problem Display
PID: 269333 (4B3/2K1p1q1/1PN1p1p1/3kn1Q1/R4Pn1/5pN1/4PB2/1b6 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Els Escacs a Catalunya, 1926

4B3/2K1p1q1/1PN1p1p1/3kn1Q1/R4Pn1/5pN1/4PB2/1b6

#2

10 + 9

1401 Postsjakk 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.Sxe7#
    • 1...Qh8
      • 2.Sxe7#
    • 1...Qg8
      • 2.Sxe7#
    • 1...Ba2
      • 2.e4#
    • 1...Sf6
      • 2.Qxe5#
  • Tries
    • 1.Se4?
      • threat
        • 2.Sc3#
        • 2.Rd4#
      • 1...Sxf2
        • 2.Rd4#
      • 1...Se3
        • 2.Rd4#
      • 1...Bxe4!
  • Keys
    • 1.Qxe7!
      • threat
        • 2.Rd4#
      • 1...Qxe7+
        • 2.Sxe7#
      • 1...Sxc6
        • 2.Bxc6#
      • 1...Sd3
        • 2.e4#
      • 1...Sc4
        • 2.Sb4#
      • 1...Sd7
        • 2.Qd6#
      • 1...Sf7
        • 2.Qc5#

This is a version of 227536

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(i);N_GUARD::S(H),XP(h)
    • B(a);N_GUARD::P(A)
    • S(c);N_GUARD,S_CUTQ(i)::QAR1(F),XS(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);XB(B)::R1(D)
        • S(c);::R1(D)
      • Refutation
        • B(a);XS(C)
  • Actual
    • Q(F);N_PINS(e),P_SPINQ(F),XP(h)
    • Threat
      • R1(D)
    • Vars
      • Q(i);CHECK,XQ(F)::S(H),XQ(i)
      • S(e);OGATE,XS(H)::B(J),XS(e)
      • S(e);S_CUTB(a)::P(A)
      • S(e);SBLOCK::S(H)
      • S(e);N_PINQ(F)::QAR1(F)
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