MESON Chess Problem Database

Problem Display
PID: 260910 (3N3K/5N2/7B/2nk1p2/3p3R/1P1b4/8/2Q5 w - - 0 1)

Leser, Conrad

Neue Zurcher Zeitung, 1935

3N3K/5N2/7B/2nk1p2/3p3R/1P1b4/8/2Q5

#2

7 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
      • 2.bxc4#
    • 1...Be4
      • 2.Qc4#
    • 1...Sxb3
      • 2.Qc6#
    • 1...Sa4
      • 2.Qc6#
    • 1...Se4
      • 2.Qc6#
    • 1...Sa6
      • 2.Qc6#
    • 1...Se6
      • 2.Qc6#
    • 1...Sb7
      • 2.Qc6#
    • 1...Sd7
      • 2.Qc6#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Rxd4#
      • 1...Sxb3
        • 2.Qc6#
      • 1...Be4
        • 2.Qc4#
      • 1...Se4
        • 2.Qc6#
      • 1...Se6
        • 2.Qc6#
      • 1...f4!
    • 1.Qf4?
      • threat
        • 2.Qe5#
        • 2.Qd6#
        • 2.Qxd4#
      • 1...Se4
        • 2.Qe5#
        • 2.Qxf5#
      • 1...Se6
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sb7
        • 2.Qe5#
        • 2.Qxd4#
      • 1...Sd7
        • 2.Qd6#
        • 2.Qxd4#
      • 1...Be4
        • 2.Qe5#
        • 2.Qd6#
      • 1...Sxb3!
  • Keys
    • 1.Re4!
      • threat
        • 2.Re5#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Bxe4
        • 2.Qc4#
      • 1...Sxe4
        • 2.Qc6#
      • 1...fxe4
        • 2.Qg5#
      • 1...Sd7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • B(a);N_GUARD::QAB1(A)
    • S(c);OGATE,XP(B)::QAB1(A)
    • S(c);OGATE::QAB1(A)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(C),XP(b)
      • Vars
        • S(c);OGATE,XP(B)::QAB1(A)
        • B(a);N_GUARD::QAB1(A)
        • S(c);OGATE::QAB1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • S(c);XP(B)
  • Actual
    • R(C);
    • Threat
      • R1(C)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB(A)
      • B(a);N_GUARD,SBLOCK,XR(C)::QAB1(A)
      • S(c);OGATE,SBLOCK,XR(C)::QAB1(A)
      • P(e);OGATEB,SBLOCK,XR(C)::QAR(A)
      • S(c);OGATE::QAB1(A)
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