MESON Chess Problem Database

Problem Display
PID: 272402 (B7/4pbK1/4N2B/1pP1k3/3p1NP1/1q1pp1p1/4Q3/8 w - - 0 1)

Zarhs, Aleksandr

Rochade Europa, 1995

B7/4pbK1/4N2B/1pP1k3/3p1NP1/1q1pp1p1/4Q3/8

#2

8 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Sxd3#
    • 1...Bxe6
      • 2.Sg6#
  • Tries
    • 1.Qxd3?
      • threat
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qxd4#
      • 1...Qxe6
        • 2.Qe4#
      • 1...Bxe6
        • 2.Sg6#
        • 2.Qe4#
      • 1...Qd1
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qc2
        • 2.Qxd4#
      • 1...Qa4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qc4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qd5
        • 2.Qf5#
      • 1...Qb1
        • 2.Qxd4#
      • 1...Qb2
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qc3
        • 2.Qe4#
        • 2.Qf5#
      • 1...Qb4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Bg6
        • 2.Qxd4#
      • 1...Qxd3!
    • 1.Qf3?
      • threat
        • 2.Qe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bg6!
    • 1.Qg2?
      • threat
        • 2.Qe4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Bg6!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf3#
      • 1...Kxf4
        • 2.Sxf7#
      • 1...Qd5
        • 2.Sxd3#
      • 1...Bd5
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD,SBLOCK,XS(E)::S(B),XP(b)
    • B(i);N_GUARD,SBLOCK,XS(E)::S(B)
  • Tries
    • Try
      • Q(A);N_PINP(c),XP(b)
      • Threat
        • DUALS(3)
      • Vars
        • Q(a);XS(E)::QAR1(A)
        • Q(a);::QAB1(A),XP(e)
        • Q(a);::QAR1(A)
        • B(i);::QAB1(A),XP(e)
      • Refutation
        • Q(a);XQ(A)
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • QAR1(A)
      • Vars
        • Q(a);N_GUARD::QAR1(A),XQ(a)
      • Refutation
        • B(i);
    • Try
      • Q(A);N_PINP(c)
      • Threat
        • QAR1(A)
      • Vars
        • Q(a);N_GUARD::QAR1(A),XQ(a)
      • Refutation
        • B(i);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(g);N_SPINP(c),S_CUTQ(a),S_FLIGHT,XS(B)::B(F)+S(E),XB(i)
      • Q(a);N_GUARD::S(B),XP(b)
      • B(i);N_GUARD::S(B)
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