MESON Chess Problem Database

Problem Display
PID: 99160 (1b2K3/2P3N1/Q2B1p2/p2p4/4k1pp/2P2n2/3r1Pr1/4N2B w - - 0 1)

Khachaturov, Sergei

Budapesti Sakkszovetseg, 1986

1b2K3/2P3N1/Q2B1p2/p2p4/4k1pp/2P2n2/3r1Pr1/4N2B

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qe2#
    • 1...Ra2
      • 2.Qd3#
    • 1...Rb2
      • 2.Qd3#
    • 1...Rc2
      • 2.Qd3#
    • 1...Re2
      • 2.Qxe2#
      • 2.Qd3#
    • 1...Rdxf2
      • 2.Qd3#
    • 1...Rd3
      • 2.Qxd3#
    • 1...Rd4
      • 2.Qe2#
    • 1...d4
      • 2.Qb7#
      • 2.Qc6#
      • 2.Qa8#
  • Tries
    • 1.Qc4+?
      • 1...Rd4
        • 2.Qe2#
      • 1...Sd4
        • 2.Bxg2#
      • 1...d4
        • 2.Qc6#
      • 1...dxc4!
    • 1.Qc8?
      • threat
        • 2.Qf5#
      • 1...Rgxf2
        • 2.Qe6#
      • 1...Sd4
        • 2.Qxg4#
      • 1...f5
        • 2.Qxf5#
      • 1...Rdxf2!
  • Keys
    • 1.c8Q!
      • threat
        • 2.Qf5#
      • 1...Rdxf2
        • 2.Qd3#
      • 1...Rgxf2
        • 2.Qe6#
      • 1...Sd4
        • 2.Qxg4#
      • 1...f5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::QAR2(E)
    • R(a);N_GUARD::QAB1(E)
    • R(a);N_GUARD,XP(C)::QAB1(E)
    • R(a);N_GUARD::QAB1(E),XR(a)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAR2(E)
        • S(c);P_SPINR(b),P_SPINS(c),S_CUTP(h),S_CUTP(h),S_CUTR(a)::B(B),XR(b)
        • P(h);OGATEB,P_SPINP(h)::QAB(E)
      • Refutation
        • P(h);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • R(b);P_SPINS(c),XP(C)::QAR2(E)
        • S(c);P_SPINR(b)::QAR2(E),XP(e)
        • P(i);::QAB1(E),XP(i)
      • Refutation
        • R(a);XP(C)
  • Actual
    • P(G);
    • Threat
      • QAB1(G)
    • Vars
      • R(a);N_GUARD,XP(C)::QAB1(E)
      • R(b);P_SPINS(c),XP(C)::QAR2(G)
      • S(c);P_SPINR(b)::QAR2(G),XP(e)
      • P(i);::QAB1(G),XP(i)
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Developed and maintained by Brian Stephenson.
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