MESON Chess Problem Database

Problem Display
PID: 110177 (1NNnK3/1ppP1p2/2p2p2/p1k5/P3p3/PBP1r2b/5Bn1/1Q6 w - - 0 1)

Labai, Zoltan

Suomen Shakki, 1980

1NNnK3/1ppP1p2/2p2p2/p1k5/P3p3/PBP1r2b/5Bn1/1Q6

#2

10 + 12

6490 yacpdb 2009
15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd7+
      • 2.Sxd7#
    • 1...Se1
      • 2.Bxe3#
    • 1...Sf4
      • 2.Bxe3#
    • 1...Sh4
      • 2.Bxe3#
    • 1...b5
      • 2.Sa6#
    • 1...b6
      • 2.Sa6#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qc4#
        • 2.Qd4#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...Be6
        • 2.Qd4#
      • 1...Se6
        • 2.Qc4#
      • 1...b5
        • 2.Sa6#
        • 2.Qd4#
      • 1...exd3+!
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...Se6!
    • 1.Qf1?
      • threat
        • 2.Qc4#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...b5
        • 2.Sa6#
      • 1...Be6!
  • Keys
    • 1.Qxe4!
      • threat
        • 2.Qe7#
      • 1...Bxd7+
        • 2.Sxd7#
      • 1...Be6
        • 2.Qd4#
      • 1...Se6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(c);CHECK,XP(G)::S(H),XB(c)
    • S(a);N_GUARD::B(B),XR(b)
    • P(i);N_GUARD::S(H)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);CHECK,XP(G)::S(H),XB(c)
        • B(c);::QAB1(A)
        • S(l);::QAR1(A)
      • Refutation
        • P(d);CHECK,XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(c);CHECK,XP(G)::S(H),XB(c)
      • Refutation
        • S(l);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • B(c);CHECK,XP(G)::S(H),XB(c)
        • P(i);N_GUARD::S(H)
      • Refutation
        • B(c);
  • Actual
    • Q(A);P_SPINQ(A),XP(d)
    • Threat
      • QAB(A)
    • Vars
      • B(c);CHECK,XP(G)::S(H),XB(c)
      • B(c);N_PINQ(A)::QAB1(A)
      • S(l);N_PINQ(A)::QAR1(A)
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