MESON Chess Problem Database

Problem Display
PID: 23245 (1n4K1/1n1p4/5Q2/p1Pkp1p1/N1p1p1R1/1PBq4/b2RN3/5B2 w - - 0 1)

Rossomakho, Yakov V

The Problemist, 1996

1n4K1/1n1p4/5Q2/p1Pkp1p1/N1p1p1R1/1PBq4/b2RN3/5B2

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc5
      • 2.Sb6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sc6
      • 2.Qf7#
  • Tries
    • 1.Sf4+?
      • 1...exf4
        • 2.Rxg5#
      • 1...gxf4!
    • 1.Bg2?
      • threat
        • 2.Bxe4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...cxb3!
    • 1.Bd4?
      • threat
        • 2.Sb6#
      • 1...Qxb3
        • 2.Bc3#
      • 1...Qxd4
        • 2.Sec3#
      • 1...exd4
        • 2.Rxg5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...d6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf7#
      • 1...Qxf1
        • 2.Se2#
      • 1...Qxd4
        • 2.Bxc4#
      • 1...Sxc5
        • 2.Sb6#
      • 1...exd4
        • 2.Rxg5#
      • 1...Qf3
        • 2.Sxf3#
        • 2.Bxc4#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(i);SBLOCK,XP(H)::S(F)
    • S(i);N_GUARD::QAR1(I),XS(i)
    • S(i);N_GUARD::QAR1(I)
    • S(k);SBLOCK::QAB(I)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • P(g);XS(C)::R(G),XP(h)
      • Refutation
        • P(h);XS(C)
    • Try
      • B(A);P_PINP(d)
      • Threat
        • B(A),XP(d)
      • Vars
        • S(i);SBLOCK,XP(H)::S(F)
        • S(i);N_GUARD::QAR1(I),XS(i)
      • Refutation
        • P(c);XP(D)
    • Try
      • B(E);N_PINQ(b)
      • Threat
        • S(F)
      • Vars
        • Q(b);OGATEB,XP(D)::R(B)+B(E)
        • Q(b);N_GUARD,P_SPINQ(b),XB(E)::S(C)
        • P(g);OGATEB,XB(E)::R(G),XP(h)
        • S(i);N_GUARD::QAR1(I),XS(i)
      • Refutation
        • P(j);
  • Actual
    • S(C);N_PINQ(b)
    • Threat
      • QAB(I)
    • Vars
      • Q(b);XB(A)::R(B)+S(C)
      • Q(b);OGATE,P_SPINQ(b),XS(C)::B(A),XP(c)
      • S(i);SBLOCK,XP(H)::S(F)
      • P(g);OGATEB,XS(C)::R(G),XP(h)
      • S(i);N_GUARD::QAR1(I),XS(i)
      • S(i);N_GUARD::QAR1(I)
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