MESON Chess Problem Database

Problem Display
PID: 207307 (b7/8/4P1R1/1n2k2N/1p2P1R1/1P6/3Q3K/4n1N1 w - - 0 1)

Stoyanov, Kiril N

Il Problema, 1962

b7/8/4P1R1/1n2k2N/1p2P1R1/1P6/3Q3K/4n1N1

#2

9 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
    • 1...Sc2
      • 2.Sf3#
    • 1...Sg2
      • 2.Sf3#
    • 1...Sf3+
      • 2.Sxf3#
    • 1...Sd4
      • 2.Qf4#
    • 1...Sd6
      • 2.Qb2#
  • Tries
    • 1.Sg3?
      • threat
        • 2.R4g5#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...Bxe4
        • 2.Rxe4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sd4
        • 2.Qf4#
      • 1...Sd6
        • 2.Qb2#
      • 1...Sd3!
    • 1.Qxb4?
      • threat
        • 2.R4g5#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...Sd4
        • 2.Qb8#
      • 1...Sd6
        • 2.Qc3#
      • 1...Bxe4!
    • 1.Qd7?
      • threat
        • 2.R6g5#
      • 1...Sf3+
        • 2.Sxf3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sd4
        • 2.Qc7#
      • 1...Bxe4!
  • Keys
    • 1.R4g5+!
      • 1...Kxe4
        • 2.Sg3#
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 6
  • Sets
    • B(e);N_GUARD::QAR1(B),XB(e)
    • S(a);N_GUARD::S(A)
    • S(a);CHECK,N_GUARD::S(A),XS(a)
    • S(c);SBLOCK::QAB1(B)
    • S(c);N_GUARD,SBLOCK::QAB(B)
  • Tries
    • Try
      • S(G);
      • Threat
        • R(F)
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
        • B(e);OGATE,XP(E)::R1(F),XB(e)
        • B(e);N_GUARD::QAR1(B),XB(e)
        • S(c);SBLOCK::QAB1(B)
        • S(c);N_GUARD,SBLOCK::QAB(B)
      • Refutation
        • S(a);
    • Try
      • Q(B);XP(b)
      • Threat
        • R(F)
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
        • S(c);OGATE,SBLOCK::QAB(B)
        • S(c);N_GUARD,SBLOCK::QAB(B)
      • Refutation
        • B(e);XP(E)
    • Try
      • Q(B);
      • Threat
        • R(I)
      • Vars
        • S(a);CHECK,N_GUARD::S(A),XS(a)
        • B(e);N_GUARD::QAR1(B),XB(e)
        • S(c);SBLOCK::QAB(B)
        • S(c);N_GUARD,SBLOCK::QAB(B)
      • Refutation
        • B(e);XP(E)
  • Actual
    • R(F);CHECK
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