MESON Chess Problem Database

Problem Display
PID: 139741 (8/p1p5/rpB5/bP1N4/kn1P4/p7/n1P2K2/7Q w - - 0 1)

Fomichev, Evgeny Vasilevich

Aleksandr Galitzky - Shakhmaty Geine (Vol 1), 2010

8/p1p5/rpB5/bP1N4/kn1P4/p7/n1P2K2/7Q

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sc3#
    • 1...Sc3
      • 2.Sxc3#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qb3#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sd3+!
  • Keys
    • 1.Qd1!
      • 1...Sd3+
        • 2.cxd3#
      • 1...Sxc2
        • 2.Qxc2#
      • 1...Sxd5
        • 2.c3#
      • 1...Sxc6
        • 2.c4#
      • 1...Sc1
        • 2.Sc3#
      • 1...Sc3
        • 2.Sxc3#

This is a version of 139740

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(F)
    • S(a);N_GUARD::S(F),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(d);OGATE,XP(B)::QAB(A),XS(d)
        • S(a);N_GUARD::S(F)
      • Refutation
        • S(d);CHECK
  • Actual
    • Q(A);
    • Vars
      • S(d);CHECK,OGATE::QAB(A)+P(B),XS(d)
      • S(d);OGATE,P_SPINS(d),XP(B)::QAB(A),XS(d)
      • S(d);N_GUARD,XS(F)::QAB(A)+P(B)
      • S(d);N_GUARD,XB(G)::QAB(A)+P(B)
      • S(a);N_GUARD::S(F)
      • S(a);N_GUARD::S(F),XS(a)
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