MESON Chess Problem Database

Problem Display
PID: 141920 (1R6/b7/K2Q3B/3PP3/N1Nk4/3P3R/3n2B1/1n3b2 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

Phenix, 1989

1R6/b7/K2Q3B/3PP3/N1Nk4/3P3R/3n2B1/1n3b2

#2

11 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bb6
      • 2.Qxb6#
    • 1...Bxb8
      • 2.Qc5#
      • 2.Qb6#
  • Tries
    • 1.Bxf1?
      • threat
        • 2.Be3#
      • 1...Sxc4
        • 2.Rh4#
      • 1...Sxf1!
    • 1.Rb4?
      • threat
        • 2.Sxd2#
      • 1...Bxd3
        • 2.Be3#
      • 1...Sxc4
        • 2.Rxc4#
      • 1...Sf3
        • 2.Scb2#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Sb3
        • 2.Scb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Scb6#
      • 1...Se4
        • 2.Scb2#
        • 2.Sd2#
        • 2.Sa3#
        • 2.Sa5#
        • 2.Scb6#
      • 1...Sa3!
    • 1.Qg6?
      • threat
        • 2.Be3#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...Sxc4
        • 2.Qe4#
      • 1...Sf3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Bxg2!
  • Keys
    • 1.Scb2!
      • threat
        • 2.Be3#
      • 1...Bxd3+
        • 2.Rxd3#
      • 1...Sf3
        • 2.Rb4#
      • 1...Sc4
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD::QAB1(I),XB(e)
    • B(e);N_GUARD::QAB(I),XB(e)
  • Tries
    • Try
      • B(A);XB(b)
      • Threat
        • B(J)
      • Vars
        • S(c);N_GUARD,XS(E)::R(C)
      • Refutation
        • S(c);XB(A)
    • Try
      • R(K);
      • Threat
        • R(K)+S(E),XS(c)
      • Vars
        • B(b);P_PINS(E),SBLOCK,XP(B)::B(J)
        • S(c);OGATE,P_SPINS(c),XS(E)::R1(K),XS(c)
        • S(c);N_GUARD::R(K)+S(E)
        • B(e);N_GUARD::QAB1(I),XB(e)
      • Refutation
        • S(a);
    • Try
      • Q(I);
      • Threat
        • B(J)
      • Vars
        • B(b);OGATE,P_PINS(E),XP(B)::QAR1(I),XB(b)
        • S(c);N_GUARD,XS(E)::QAR1(I)
        • S(c);N_GUARD::QAR1(I)
        • S(c);N_GUARD::QAR1(I),XS(c)
      • Refutation
        • B(b);XB(A)
  • Actual
    • S(E);P_SPINP(B)
    • Threat
      • B(J)
    • Vars
      • B(b);CHECK,OGATE,XP(B)::R1(C),XB(b)
      • S(c);N_GUARD::R(K)
      • S(c);N_GUARD,N_PINP(B)::R(C)
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