MESON Chess Problem Database

Problem Display
PID: 55664 (K1B1bR1r/1n6/7n/4N1p1/1NpPk1p1/4p1Qp/3P2P1/b5q1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

2nd Prize, Schweizerische Schachzeitung, 1963

K1B1bR1r/1n6/7n/4N1p1/1NpPk1p1/4p1Qp/3P2P1/b5q1

#2

9 + 12

3747 FIDE Album (1962-1964) 1968

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Qxe3#
    • 1...Qb1
      • 2.Qxe3#
    • 1...Qc1
      • 2.Qxe3#
    • 1...Qd1
      • 2.Qxe3#
    • 1...Qf1
      • 2.Qxe3#
    • 1...Qh1
      • 2.Qxe3#
    • 1...Qxg2
      • 2.Qxe3#
    • 1...Sf5
      • 2.Qxg4#
    • 1...Sf7
      • 2.Qxg4#
    • 1...Sg8
      • 2.Qxg4#
  • Tries
    • 1.Sed3?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Qh2
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Bxd4!
    • 1.Sf3?
      • threat
        • 2.Qe5#
      • 1...Bxd4
        • 2.Sxg5#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Qh2!
    • 1.Sxc4?
      • threat
        • 2.Qe5#
      • 1...Bxd4
        • 2.d3#
      • 1...Qh2
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Kxd4!
    • 1.Sxg4?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Bxd4
        • 2.Qf3#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...Qh2
        • 2.Qxe3#
      • 1...Sf7!
    • 1.Sec6?
      • threat
        • 2.Qe5#
      • 1...Qh2
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Bxd4!
    • 1.Sg6?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Qh2
        • 2.Qxe3#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Bxd4!
    • 1.Sf7?
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Qxg2
        • 2.Qxe3#
      • 1...Bxd4
        • 2.Sxg5#
      • 1...Sxf7
        • 2.Qxg4#
      • 1...Qh2
        • 2.Qxe3#
      • 1...hxg2!
    • 1.Bf5+?
      • 1...Sxf5
        • 2.Qxg4#
      • 1...Kxd4!
    • 1.Qf3+?
      • 1...Kxd4
        • 2.Qd5#
      • 1...gxf3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qe5#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Bxd4
        • 2.Bxb7#
      • 1...Sf7
        • 2.Qxg4#
      • 1...Qh2
        • 2.Qxe3#

This is a version of 234207

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::QAR1(C),XP(c)
    • Q(b);N_GUARD,XP(B)::QAR1(C),XP(c)
    • S(i);N_GUARD::QAR2(C),XP(g)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(f);P-FLIGHT,XP(E)::QAB1(C)
        • Q(b);N_GUARD::QAR1(C),XP(c)
        • S(i);N_GUARD::QAR2(C),XP(g)
      • Refutation
        • B(a);XP(E)
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • B(a);SBLOCK,XP(E)::S(F),XP(h)
        • S(i);N_GUARD::QAR2(C),XP(g)
      • Refutation
        • Q(b);
    • Try
      • S(F);XP(e)
      • Threat
        • QAR1(C)
      • Vars
        • B(a);SBLOCK,XP(E)::P(A)
        • Q(b);N_GUARD::QAR1(C),XP(c)
        • S(i);N_GUARD::QAR2(C),XP(g)
      • Refutation
        • K(f);P-FLIGHT,XP(E)
    • Try
      • S(F);XP(g)
      • Threat
        • QAR1(C)
      • Vars
        • K(f);P-FLIGHT,XP(E)::QAB1(C)
        • B(a);SBLOCK,XP(E)::QAB1(C)
        • S(i);OGATE,XS(F)::QAR2(C),XS(i)
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • S(i);
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • Q(b);N_GUARD::QAR1(C),XP(c)
        • S(i);N_GUARD::QAR2(C),XP(g)
      • Refutation
        • B(a);XP(E)
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(f);P-FLIGHT,XP(E)::QAB1(C)
        • Q(b);N_GUARD::QAR1(C),XP(c)
        • S(i);N_GUARD::QAR2(C),XP(g)
      • Refutation
        • B(a);XP(E)
    • Try
      • S(F);
      • Threat
        • QAR1(C)
      • Vars
        • K(f);P-FLIGHT,XP(E)::QAB1(C)
        • Q(b);N_GUARD,XP(B)::QAR1(C),XP(c)
        • B(a);SBLOCK,XP(E)::S(F),XP(h)
        • S(i);N_GUARD,XS(F)::QAR2(C),XP(g)
        • Q(b);N_GUARD::QAR1(C),XP(c)
      • Refutation
        • P(d);XP(B)
    • Try
      • B(H);CHECK
      • Vars
        • S(i);XB(H)::QAR2(C),XP(g)
      • Refutation
        • K(f);P-FLIGHT,XP(E)
    • Try
      • Q(C);CHECK
      • Vars
        • K(f);OGATE,P-FLIGHT,XP(E)::QAR1(C)
      • Refutation
        • P(g);XQ(C)
  • Actual
    • S(F);
    • Threat
      • QAR1(C)
    • Vars
      • K(f);P-FLIGHT,XP(E)::QAB1(C)
      • B(a);SBLOCK,XP(E)::B(H),XS(j)
      • S(i);N_GUARD::QAR2(C),XP(g)
      • Q(b);N_GUARD::QAR1(C),XP(c)
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