MESON Chess Problem Database

Problem Display
PID: 271450 (B2r3q/RQ1P4/4p2r/2R3pp/1P1k4/3Pp3/1p1nP3/4B2K w - - 0 1)

Brada, Miroslav

Pat a Mat, 1994

B2r3q/RQ1P4/4p2r/2R3pp/1P1k4/3Pp3/1p1nP3/4B2K

#2

10 + 10

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd7
      • 2.Qxd7#
    • 1...Sb1
      • 2.Qe4#
    • 1...Sf1
      • 2.Bc3#
      • 2.Qe4#
    • 1...Sb3
      • 2.Bc3#
      • 2.Qe4#
    • 1...Sf3
      • 2.Bc3#
      • 2.Qe4#
    • 1...Sc4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...e5
      • 2.Qd5#
  • Tries
    • 1.Rc4+?
      • 1...Sxc4
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qb6?
      • threat
        • 2.Qd6#
      • 1...Rxd7
        • 2.Rxd7#
      • 1...Qe5
        • 2.Rc4#
      • 1...Sc4
        • 2.Rd5#
      • 1...Se4
        • 2.Rd5#
      • 1...e5
        • 2.Rc4#
      • 1...Qf8!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qd6#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Qf8
        • 2.Qe5#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Se4
        • 2.Rc4#
      • 1...e5
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(i);OGATE,XP(I)::QAR(H),XR(i)
    • S(b);N_GUARD::QAR1(H)
    • S(b);N_GUARD::QAR1(H),XS(b)
    • P(g);N_GUARD::QAR1(H)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(b);XR(F)::QAR1(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • R(i);OGATE,XP(I)::R(G),XR(i)
        • Q(j);SBLOCK::QAB(H)+R(F),DCHECK
        • S(b);::QAB(H)+R(F),DCHECK
        • P(g);SBLOCK::QAB(H)+R(F),DCHECK
      • Refutation
        • Q(j);
  • Actual
    • Q(H);
    • Threat
      • QAR2(H)
    • Vars
      • R(i);OGATE,XP(I)::QAR(H),XR(i)
      • Q(j);N_GUARD::QAB1(H),XQ(j)
      • Q(j);N_GUARD::QAB1(H)
      • S(b);N_GUARD::R1(F),XS(b)
      • S(b);N_GUARD::R1(F)
      • P(g);N_GUARD::R1(F)
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