MESON Chess Problem Database

Problem Display
PID: 268085 (BB6/1Q5K/7p/3Nr3/R2nk1P1/8/1pP1P3/1bqr4 w - - 0 1)

Ivanov, Vadim Aleksandrovich

The Problemist, 1999

BB6/1Q5K/7p/3Nr3/R2nk1P1/8/1pP1P3/1bqr4

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qe7#
    • 1...Re7+
      • 2.Qxe7#
  • Tries
    • 1.Rxd4+?
      • 1...Kxd4
        • 2.Qb4#
      • 1...Rxd4!
    • 1.Qf7?
      • threat
        • 2.Qf3#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qe3
        • 2.Sc3#
      • 1...Rd3
        • 2.exd3#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Re7
        • 2.Qxe7#
      • 1...Rf1!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qf3#
      • 1...Re7+
        • 2.Sxe7#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qf4
        • 2.Sf6#
      • 1...Rf1
        • 2.Qd3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rf5
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(g);OGATEB,P_SPINR(g),XS(E)::QAR(F)
    • R(g);CHECK,OGATEB::QAR(F),XR(g)
  • Tries
    • Try
      • R(C);CHECK,XS(e)
      • Vars
        • K(f);P-FLIGHT,P_PINP(A),S_CUTR(c),XR(C)::QAR2(F)
      • Refutation
        • R(c);XR(C)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Vars
        • Q(b);N_GUARD::QAR1(F),XQ(b)
        • Q(b);SBLOCK::B(H)+S(E),DCHECK
        • R(c);OGATE::P(B),XR(c)
        • R(g);N_GUARD::QAB1(F),XR(g)
        • R(g);OGATEB,P_PINQ(F)::QAR(F),XR(g)
      • Refutation
        • R(c);
  • Actual
    • Q(F);
    • Threat
      • QAB1(F)
    • Vars
      • R(g);CHECK,N_GUARD::B(H)+S(E),XR(g)
      • Q(b);N_GUARD::QAR1(F),XQ(b)
      • Q(b);SBLOCK::B(H)+S(E),DCHECK
      • R(c);N_GUARD::QAB1(F)
      • R(c);N_GUARD::QAB1(F),XR(c)
      • R(g);::B(H)+S(E),DCHECK
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