MESON Chess Problem Database

Problem Display
PID: 244188 (5r2/4p3/8/2N5/1p2n3/r4k1P/Q1p1p1RK/4B3 w - - 0 1)

Brabec, Juraj

Pat a Mat, 2019

5r2/4p3/8/2N5/1p2n3/r4k1P/Q1p1p1RK/4B3

#2

6 + 8

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc4?
      • threat
        • 2.Qxe4#
      • 1...Ke3
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Rg3#
      • 1...Rf4
        • 2.Qxe2#
      • 1...Sd2
        • 2.Rg3#
      • 1...Sf2
        • 2.Rg3#
      • 1...Sc3
        • 2.Rg3#
      • 1...Sg3
        • 2.Rxg3#
      • 1...Sg5
        • 2.Rg3#
      • 1...Sd6
        • 2.Rg3#
      • 1...Sf6
        • 2.Rg3#
      • 1...Re3!
    • 1.Qe6?
      • threat
        • 2.Qxe4#
      • 1...Ke3
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Rf2#
      • 1...Re3
        • 2.Qg4#
      • 1...Sd2
        • 2.Rf2#
      • 1...Sf2
        • 2.Rxf2#
      • 1...Sc3
        • 2.Rf2#
      • 1...Sg3
        • 2.Rf2#
      • 1...Sg5
        • 2.Rf2#
      • 1...Sd6
        • 2.Rf2#
      • 1...Sf6
        • 2.Rf2#
      • 1...Rf4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Qxe4#
      • 1...Ke3
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...Re3
        • 2.Rf2#
      • 1...Rf4
        • 2.Rg3#

Anticipated by 103897(1967), 148126(1977)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(f)
      • Vars
        • K(d);P-FLIGHT::QAR1(B),XS(f)
        • K(d);P-FLIGHT,P_SPINS(f)::QAR1(B),XS(f)
        • S(f);N_GUARD,XS(F)::R1(C)
        • R(h);SBLOCK::QAB1(B),XP(b)
        • S(f);N_GUARD::R1(C)
        • S(f);N_GUARD::R1(C),XS(f)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XS(f)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(f)::QAR1(B),XS(f)
        • K(d);P-FLIGHT::QAR1(B),XS(f)
        • S(f);N_GUARD,XS(F)::R1(C)
        • R(c);SBLOCK::QAB1(B)
        • S(f);N_GUARD::R1(C)
        • S(f);N_GUARD::R1(C),XS(f)
      • Refutation
        • R(h);
  • Actual
    • Q(B);P_PINS(f)
    • Threat
      • QAB1(B),XS(f)
    • Vars
      • K(d);N_SPINS(f),P-FLIGHT::QAR1(B),XS(f)
      • R(c);SBLOCK::R1(C)
      • R(h);SBLOCK::R1(C)
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