MESON Chess Problem Database

Problem Display
PID: 189566 (8/8/1Q2B3/3Pk3/3NN3/2qpbK2/8/8 w - - 0 1)

Illyes, Janos

Pesti Naplo, 1911

8/8/1Q2B3/3Pk3/3NN3/2qpbK2/8/8

#2

6 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Sc6#
    • 1...Qe1
      • 2.Sc6#
    • 1...Qb2
      • 2.Sc6#
    • 1...Qd2
      • 2.Sc6#
    • 1...Qb4
      • 2.Sc6#
    • 1...Qxd4
      • 2.Qc7#
      • 2.Qd6#
      • 2.Qb8#
    • 1...Qa5
      • 2.Sc6#
    • 1...Qa3
      • 2.Sc6#
    • 1...Qb3
      • 2.Sc6#
    • 1...Qc6
      • 2.Sxc6#
    • 1...Bxd4
      • 2.Qd6#
  • Tries
    • 1.Qc5?
      • threat
        • 2.Sc6#
      • 1...Qxd4
        • 2.Qd6#
        • 2.Qc7#
      • 1...Bxd4
        • 2.Qd6#
      • 1...Qxc5!
    • 1.Qc7+?
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Qxc7!
    • 1.Qb8+?
      • 1...Qc7
        • 2.Sc6#
      • 1...Kxd4!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Sc6#
      • 1...Kxd4
        • 2.Qxc3#
      • 1...Qxd4
        • 2.Qb8#
      • 1...Bxd4
        • 2.Qh2#
      • 1...Qc6
        • 2.Sxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
    • B(c);SBLOCK,XS(B)::QAB1(E)
  • Tries
    • Try
      • Q(E);
      • Threat
        • S(B)
      • Vars
        • B(c);SBLOCK,XS(B)::QAB1(E)
      • Refutation
        • Q(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(B)::QAB1(E),XQ(a)
      • Refutation
        • Q(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::S(B)
      • Refutation
        • K(d);S_FLIGHT,XS(B)
  • Actual
    • Q(E);
    • Threat
      • S(B)
    • Vars
      • K(d);OGATEB,P_SPINQ(a),S_FLIGHT,XS(B)::QAB1(E),XQ(a)
      • Q(a);N_GUARD,P_SPINQ(a),SBLOCK,XS(B)::QAB(E)
      • B(c);N_GUARD,SBLOCK,XS(B)::QAB(E)
      • Q(a);::QAB(E)+S(B),DCHECK,XQ(a)
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