MESON Chess Problem Database

Problem Display
PID: 107145 (1Q2K3/8/p2p4/P7/p2p3B/P6N/3p2Rp/1Nb2k1B w - - 0 1)

Smotrov, Sergey

Kudesnik, 1991

1Q2K3/8/p2p4/P7/p2p3B/P6N/3p2Rp/1Nb2k1B

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Sxd2#
    • 1...Bxa3
      • 2.Sxd2#
    • 1...d5
      • 2.Qf4#
  • Tries
    • 1.Qb2?
      • 1...Bxb2
        • 2.Sxd2#
      • 1...d1Q
        • 2.Qf2#
      • 1...d1S
        • 2.Qe2#
      • 1...d1B
        • 2.Qf2#
      • 1...d1R
        • 2.Qe2#
        • 2.Qf2#
      • 1...d3
        • 2.Qf6#
      • 1...d5!
    • 1.Qb3?
      • threat
        • 2.Qd1#
        • 2.Qf7#
        • 2.Qd3#
        • 2.Qf3#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1S
        • 2.Qxd1#
        • 2.Qd3#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
        • 2.Qf3#
      • 1...d3
        • 2.Qd1#
        • 2.Qf7#
        • 2.Qxd3#
      • 1...d5
        • 2.Qd1#
        • 2.Qd3#
        • 2.Qf3#
      • 1...axb3!
    • 1.Qb5+?
      • 1...d3
        • 2.Qxd3#
        • 2.Qf5#
      • 1...axb5!
  • Keys
    • 1.Qb4!
      • 1...Bxa3
        • 2.Sxd2#
      • 1...d1Q
        • 2.Rf2#
      • 1...d1S
        • 2.Qe1#
      • 1...d1B
        • 2.Rf2#
        • 2.Qe1#
      • 1...d1R
        • 2.Rf2#
      • 1...Bb2
        • 2.Sxd2#
      • 1...d3
        • 2.Qf4#
      • 1...d5
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::S(A),XP(c)
    • B(a);N_GUARD,XP(D)::S(A),XP(c)
    • P(h);OGATE::QAR(H)
  • Tries
    • Try
      • Q(H);
      • Vars
        • B(a);N_GUARD,XQ(H)::S(A),XP(c)
        • P(c);OGATE::QAR1(H)
        • P(c);OGATE::QAB1(H)
        • P(f);OGATE::QAR(H)
      • Refutation
        • P(h);
    • Try
      • Q(H);
      • Threat
        • DUALS(4)
      • Vars
        • P(c);::QAR2(H),XQ(c)
        • P(c);::QAR2(H),XB(c)
      • Refutation
        • P(e);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • P(g);XQ(H)
  • Actual
    • Q(H);
    • Vars
      • B(a);N_GUARD,XP(D)::S(A),XP(c)
      • P(c);::R1(C)
      • P(c);OGATE::QAR1(H)
      • B(a);N_GUARD::S(A),XP(c)
      • P(f);OGATE::QAR(H)
      • P(h);OGATE::QAB(H)
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