MESON Chess Problem Database

Problem Display
PID: 98249 (1q6/4pN2/2Q1nppP/3n1kb1/2r2PN1/4P1R1/6BK/5R2 w - - 0 1)

Lobusov, Andrey Jakovlevic

Problemas, 1975

1q6/4pN2/2Q1nppP/3n1kb1/2r2PN1/4P1R1/6BK/5R2

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4
      • 2.Qxd5#
    • 1...Qa7
      • 2.Qxd5#
    • 1...Qb1
      • 2.Qxd5#
    • 1...Qb3
      • 2.Qxd5#
    • 1...Qb4
      • 2.Qxd5#
    • 1...Qb6
      • 2.Qxd5#
    • 1...Qc8
      • 2.Qxd5#
    • 1...Qe8
      • 2.Qxd5#
    • 1...Qf8
      • 2.Qxd5#
    • 1...Qg8
      • 2.Qxd5#
    • 1...Qh8
      • 2.Qxd5#
    • 1...Rc1
      • 2.e4#
    • 1...Rc2
      • 2.Qxc2#
      • 2.e4#
    • 1...Rc3
      • 2.e4#
    • 1...Rxf4
      • 2.Qc2#
      • 2.e4#
    • 1...Rc5
      • 2.e4#
    • 1...Rxc6
      • 2.e4#
    • 1...Bxh6
      • 2.Sgxh6#
      • 2.Sfxh6#
    • 1...Sxe3
      • 2.Sxe3#
    • 1...Sd4
      • 2.e4#
  • Tries
    • 1.Sd6+?
      • 1...exd6
        • 2.Qxd5#
      • 1...Qxd6!
  • Keys
    • 1.Bh3!
      • threat
        • 2.Sf2#
      • 1...Ke4
        • 2.Sf2#
      • 1...Qxf4
        • 2.Qxd5#
      • 1...Rxf4
        • 2.Qc2#
      • 1...Sxe3
        • 2.Sxe3#
      • 1...Sdxf4
        • 2.Sge5#
      • 1...Sexf4
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 15
  • Sets
    • Q(i);N_GUARD,P_PINR(E),P_SPINQ(i),XP(F)::QAR2(H),XS(b)
    • Q(i);N_GUARD::QAR2(H),XS(b)
    • Q(i);N_GUARD,P_PINP(I)::QAR2(H),XS(b)
    • R(a);N_GUARD::P(D)
    • R(a);N_GUARD,XQ(H)::P(D)
    • S(b);XP(D)::S(G),XS(b)
    • S(e);S_CUTR(a)::P(D)
  • Tries
    • Try
      • S(J);CHECK
      • Vars
        • P(h);XS(J)::QAR2(H),XS(b)
      • Refutation
        • Q(i);XS(J)
  • Actual
    • B(B);
    • Threat
      • B(B)+S(G)
    • Vars
      • K(c);P_SPINS(b),S_FLIGHT::S(G)
      • Q(i);N_GUARD,P_PINR(E),P_SPINQ(i),XP(F)::QAR2(H),XS(b)
      • R(a);OGATE,P_SPINR(a),XP(F)::QAB(H)
      • S(b);XP(D)::B(B)+S(G),DCHECK,XS(b)
      • S(b);P_SPINS(b),XP(F)::B(B)+S(G)
      • S(e);P_SPINS(e),XP(F)::B(B)+S(G),XP(f)
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