MESON Chess Problem Database

Problem Display
PID: 210388 (4BN2/2K1pp2/8/1Nk1B3/1pp1P3/q4n2/Q7/8 w - - 0 1)

Wester, Anders Emil

Revista Romana de Sah, 1967

4BN2/2K1pp2/8/1Nk1B3/1pp1P3/q4n2/Q7/8

#2

7 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qa7#
    • 1...Qb2
      • 2.Qa7#
    • 1...Qb3
      • 2.Qa7#
    • 1...Qc3
      • 2.Qa7#
    • 1...Qd3
      • 2.Qa7#
    • 1...Qe3
      • 2.Qa7#
    • 1...Qa7+
      • 2.Qxa7#
    • 1...Se1
      • 2.Bd4#
    • 1...Sg1
      • 2.Bd4#
    • 1...Sd2
      • 2.Bd4#
    • 1...Sh2
      • 2.Bd4#
    • 1...Sd4
      • 2.Bxd4#
    • 1...Sh4
      • 2.Bd4#
    • 1...Sg5
      • 2.Bd4#
    • 1...b3
      • 2.Qxa3#
    • 1...c3
      • 2.Qd5#
    • 1...e6
      • 2.Bd6#
    • 1...f5
      • 2.Se6#
    • 1...f6
      • 2.Se6#
  • Tries
    • 1.Sxa3?
      • threat
        • 2.Sd7#
        • 2.Qxc4#
      • 1...Sxe5
        • 2.Qf2#
      • 1...bxa3
        • 2.Qxa3#
      • 1...Sd2
        • 2.Sd7#
      • 1...c3
        • 2.Sd7#
        • 2.Qc4#
        • 2.Qd5#
      • 1...b3!
    • 1.Qf2+?
      • 1...Sd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...Qe3!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Sd7#
      • 1...Qa5+
        • 2.Qxa5#
      • 1...Qa7+
        • 2.Qxa7#
      • 1...Qxc3
        • 2.Qa5#
        • 2.Qa7#
      • 1...Sxe5
        • 2.Qf2#
      • 1...bxc3
        • 2.Qxa3#
      • 1...b3
        • 2.Qxa3#
      • 1...Qa4
        • 2.Sxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 17
  • Sets
    • Q(a);OGATE::QAB(A)
    • Q(a);CHECK,OGATE::QAB(A),XQ(a)
    • S(b);N_GUARD::B(D)
    • S(b);N_GUARD::B(D),XS(b)
    • P(c);OGATEB::QAB(A),XQ(a)
    • P(d);OGATE::QAR1(A)
    • P(f);N_GUARD::B(D)
    • P(g);N_GUARD::S(G)
  • Tries
    • Try
      • S(C);XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);N_GUARD,XB(D)::QAB(A)
        • P(c);OGATE,XS(C)::QAB(A),XP(c)
        • S(b);::S(G)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • Q(a);P_SPINQ(a)
  • Actual
    • S(C);
    • Threat
      • S(G)
    • Vars
      • Q(a);CHECK,OGATE::QAR2(A),XQ(a)
      • Q(a);CHECK,OGATE::QAB(A),XQ(a)
      • S(b);N_GUARD,XB(D)::QAB(A)
      • P(c);OGATEB,XS(C)::QAB(A),XQ(a)
      • P(c);OGATEB::QAB(A),XQ(a)
      • Q(a);N_GUARD::S(C),XQ(a)
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