MESON Chess Problem Database

Problem Display
PID: 96922 (8/8/8/4b2K/7p/5B1N/4NQpk/r6q w - - 0 1)

Zabala Apraiz, Miguel

Problemas, 1975

8/8/8/4b2K/7p/5B1N/4NQpk/r6q

#2

5 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxh3
      • 2.Qxh4#
    • 1...Qb1
      • 2.Qxg2#
    • 1...Qc1
      • 2.Qxg2#
    • 1...Qd1
      • 2.Qxg2#
    • 1...Qe1
      • 2.Qxg2#
  • Tries
    • 1.Shf4?
      • threat
        • 2.Qxh4#
      • 1...Qe1
        • 2.Qxg2#
      • 1...h3
        • 2.Qg3#
      • 1...Bf6!
  • Keys
    • 1.Qxh4!
      • threat
        • 2.Shg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...Qe1
        • 2.Sf2#
      • 1...Qg1
        • 2.Shxg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...g1Q
        • 2.Shxg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...g1S
        • 2.Shxg1#
      • 1...g1B
        • 2.Shxg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...g1R
        • 2.Shxg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...Ra4
        • 2.Shf4#
      • 1...Rg1
        • 2.Shxg1#
        • 2.Sf2#
        • 2.Shf4#
        • 2.Sg5#
      • 1...Bg3
        • 2.Qxg3#
      • 1...Bf4
        • 2.Shg1#
        • 2.Sf2#
        • 2.Shxf4#
        • 2.Sg5#
      • 1...Bf6
        • 2.Sg5#
        • 2.Qg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • K(d);N_SPINP(c),OGATEB,P-FLIGHT,XS(D)::QAR1(B),XP(e)
    • Q(b);N_GUARD::QAR1(B),XP(c)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR2(B),XP(e)
      • Vars
        • Q(b);N_GUARD::QAR1(B),XP(c)
        • P(e);N_GUARD::QAB1(B)
      • Refutation
        • B(f);
  • Actual
    • Q(B);N_PINP(c),XP(e)
    • Threat
      • DUALS(4)
    • Vars
      • Q(b);::QAR(B)+S(D)
      • P(c);::QAR(B)+S(D),XS(c)
      • R(a);SBLOCK::QAR(B)+S(D)
      • B(f);N_GUARD::QAB1(B),XB(f)
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