MESON Chess Problem Database

Problem Display
PID: 170206 (2N5/3p4/K1p3BR/3k1Pn1/1QpNRq1b/2n1rp2/8/6B1 w - - 0 1)

Machler, Emil

Tages-Anzeiger, 1990

2N5/3p4/K1p3BR/3k1Pn1/1QpNRq1b/2n1rp2/8/6B1

#2

9 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qd6#
    • 1...c5
      • 2.Qb7#
  • Tries
    • 1.Sxf3?
      • threat
        • 2.Qxc4#
      • 1...Qxe4
        • 2.Sb6#
        • 2.Qd6#
      • 1...Rxe4
        • 2.Sb6#
        • 2.Qc5#
      • 1...Scxe4
        • 2.Sb6#
        • 2.Se7#
      • 1...Sgxe4
        • 2.Sb6#
        • 2.Bf7#
      • 1...c5
        • 2.Qb7#
      • 1...Kxe4!
    • 1.Qxc4+?
      • 1...Kxe4
        • 2.Sxc6#
      • 1...Kxc4!
  • Keys
    • 1.Sxc6!
      • threat
        • 2.Qxc4#
      • 1...Kxe4
        • 2.Qxc4#
      • 1...Kxc6
        • 2.Qxc4#
      • 1...Qxe4
        • 2.Qd6#
      • 1...Rxe4
        • 2.Qc5#
      • 1...Scxe4
        • 2.S8e7#
      • 1...Sgxe4
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(e);N_GUARD,SBLOCK,XR(D)::QAR1(B)
    • P(i);OGATEB,SBLOCK::QAB(B)
  • Tries
    • Try
      • S(C);XP(c)
      • Threat
        • QAB1(B),XP(d)
      • Vars
        • P(i);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • K(g);P_SPINP(d),S_FLIGHT,XR(D)
    • Try
      • Q(B);CHECK,XP(d)
      • Vars
        • K(g);S_FLIGHT,XR(D)::QAR(B)+S(C),XP(i)
      • Refutation
        • K(g);S_FLIGHT,XQ(B)
  • Actual
    • S(C);XP(i)
    • Threat
      • QAB1(B),XP(d)
    • Vars
      • K(g);P_SPINP(d),S_FLIGHT,XR(D)::QAR2(B),XP(d)
      • K(g);S_FLIGHT,XS(C)::QAR2(B),XP(d)
      • Q(e);N_GUARD,SBLOCK,XR(D)::QAR1(B)
      • R(b);SBLOCK,XR(D)::QAR1(B)
      • S(a);SBLOCK,XR(D)::S(I)
      • S(h);N_GUARD,SBLOCK,XR(D)::B(G)
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