MESON Chess Problem Database

Problem Display
PID: 258242 (n2r4/KB6/1pp1RP2/4P1B1/1P1k1p1r/1Ppp1Q2/Nnb5/4bN2 w - - 0 1)

Labai, Zoltan

2nd HM., Polski Zwiazek Szachowy, 2019

(First published on Tue Nov 26 2019)

n2r4/KB6/1pp1RP2/4P1B1/1P1k1p1r/1Ppp1Q2/Nnb5/4bN2

#2

11 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qe4#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sf5#
      • 1...fxe3
        • 2.Bxe3#
      • 1...d2
        • 2.Sxc2#
      • 1...Bxb3!
    • 1.Sg3?
      • threat
        • 2.Sf5#
        • 2.Qe4#
      • 1...Bxb3
        • 2.Qe4#
      • 1...fxg3
        • 2.Be3#
      • 1...d2
        • 2.Se2#
      • 1...Bxg3!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qe4#
      • 1...Rd5
        • 2.Qxd5#
      • 1...d2
        • 2.Qxc3#
      • 1...f3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(j);::QAR1(D)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • P(g);OGATE,XS(A)::B(G),XP(g)
        • P(e);N_GUARD::S(A),XB(c)
      • Refutation
        • B(c);XP(C)
    • Try
      • S(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XP(C)::QAR1(D)
        • P(g);OGATE,XS(A)::B(G)
        • P(e);N_GUARD::S(A)
      • Refutation
        • B(a);XS(A)
  • Actual
    • Q(D);XP(j)
    • Threat
      • QAR1(D)
    • Vars
      • R(l);N_GUARD::QAR1(D),XR(l)
      • P(e);S_CUTB(a)::QAB1(D),XP(d)
      • P(g);OGATE::B(G)
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