MESON Chess Problem Database

Problem Display
PID: 225162 (2r3n1/p7/Kb6/1PQp1p2/4k2p/1p2Bpp1/2R4q/1B2N3 w - - 0 1)

Apro, Laszlo

Chess Life, 1970

2r3n1/p7/Kb6/1PQp1p2/4k2p/1p2Bpp1/2R4q/1B2N3

#2

7 + 12

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Ba5
      • 2.Qd4#
    • 1...Bc7
      • 2.Qd4#
    • 1...Bd8
      • 2.Qd4#
    • 1...Sf6
      • 2.Qe7#
    • 1...Sh6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Qxd5+?
      • 1...Kxe3
        • 2.Qe5#
      • 1...Kxd5!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qf4#
        • 2.Qe6#
      • 1...Kxe3
        • 2.Qe5#
      • 1...Bxe3
        • 2.Rc4#
      • 1...f4
        • 2.Qxf4#
        • 2.Qe6#
      • 1...Rc6
        • 2.Qf4#
      • 1...Re8
        • 2.Re2#
        • 2.Qf4#
      • 1...Bd4
        • 2.Qf4#
      • 1...Bc7
        • 2.Re2#
      • 1...g2
        • 2.Rc3#
      • 1...d4
        • 2.Qe6#

There are these versions: 225163

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • B(i);N_GUARD::QAR1(F)
    • S(l);N_GUARD::QAR(F)
    • S(l);N_GUARD::QAR(F),XS(l)
  • Tries
    • Try
      • Q(F);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XB(D)::QAR2(F)
      • Refutation
        • K(e);S_FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(e);P-FLIGHT,XB(D)::QAR2(F)
      • B(i);SBLOCK,XB(D)::B(A)+R(C),DCHECK
      • R(k);::QAR1(F)
      • B(i);::QAR1(F)
      • B(i);S_CUTR(k)::B(A)+R(C)
      • P(d);S_CUTQ(a)::B(A)+R(C)
      • P(g);::QAR2(F)
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