MESON Chess Problem Database

Problem Display
PID: 170203 (4Q3/3pK3/7p/3pk3/1p1rPp2/2npb1P1/3nR3/B3N3 w - - 0 1)

Machler, Emil

Tages-Anzeiger, 1988

4Q3/3pK3/7p/3pk3/1p1rPp2/2npb1P1/3nR3/B3N3

#2

7 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Kf6#
    • 1...Bg1
      • 2.Qh5#
      • 2.Qh8#
    • 1...Bf2
      • 2.Qh5#
      • 2.Qh8#
    • 1...dxe4
      • 2.Qh5#
    • 1...d6
      • 2.Kf7#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qf5#
      • 1...Rxe4
        • 2.Qf6#
      • 1...Sdxe4
        • 2.Sf3#
      • 1...Scxe4
        • 2.Sxd3#
      • 1...dxe4
        • 2.Qh5#
      • 1...Rc4!
    • 1.Qxd7?
      • threat
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kxe4
        • 2.Qe6#
      • 1...Sdxe4
        • 2.Sf3#
        • 2.Qe6#
      • 1...Scxe4
        • 2.Sxd3#
        • 2.Qe6#
      • 1...fxg3
        • 2.Qf5#
      • 1...dxe4
        • 2.Qe6#
      • 1...Rc4
        • 2.Qxd5#
      • 1...Rxe4!
    • 1.Qb8+?
      • 1...Kxe4
        • 2.Qxf4#
      • 1...d6!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf5#
      • 1...Kxe4
        • 2.Qxf4#
      • 1...Rxe4
        • 2.Qf6#
      • 1...Sdxe4
        • 2.Sf3#
      • 1...Scxe4
        • 2.Sxd3#
      • 1...dxe4
        • 2.Qh5#
      • 1...Rc4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • K(i);P-FLIGHT,P_SPINB(d),XP(E)::QAR(G)+K(F)
    • P(h);SBLOCK,XP(E)::QAR(G)
    • P(k);SBLOCK::QAR(G)+K(F)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • R(f);P_SPINS(b),SBLOCK,XP(E)::QAB1(G)
        • S(a);N_GUARD,XP(E)::S(B)
        • S(b);P_SPINR(f),XP(E)::S(B),XP(c)
        • P(h);SBLOCK,XP(E)::QAR(G)
      • Refutation
        • R(f);P_SPINS(b)
    • Try
      • Q(G);XP(k)
      • Threat
        • DUALS(2)
      • Vars
        • K(i);P-FLIGHT,P_SPINB(d),XP(E)::QAR2(G)
        • P(g);XP(D)::QAR1(G)
        • P(h);SBLOCK,XP(E)::QAR1(G)
        • R(f);N_GUARD,P_SPINS(b)::QAR1(G),XP(h)
      • Refutation
        • R(f);P_SPINS(b),XP(E)
    • Try
      • Q(G);CHECK
      • Vars
        • K(i);OGATE,P-FLIGHT,P_SPINB(d),XP(E)::QAR1(G),XP(g)
      • Refutation
        • P(k);P_SPINP(k)
  • Actual
    • Q(G);
    • Threat
      • QAR1(G)
    • Vars
      • K(i);P-FLIGHT,P_SPINB(d),XP(E)::QAR1(G),XP(g)
      • R(f);P_SPINS(b),SBLOCK,XP(E)::QAB1(G)
      • S(a);N_GUARD,SBLOCK,XP(E)::S(B)
      • S(b);P_SPINR(f),SBLOCK,XP(E)::S(B),XP(c)
      • P(h);SBLOCK,XP(E)::QAR(G)
      • R(f);N_GUARD,P_SPINS(b)::QAR1(G),XP(h)
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