MESON Chess Problem Database

Problem Display
PID: 170507 (2K5/3p4/8/kBp5/1NQ5/r7/8/8 w - - 0 1)

Nagler, Alois

Basler Nachrichten, 1941

2K5/3p4/8/kBp5/1NQ5/r7/8/8

#2

4 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Ba6?
      • threat
        • 2.Qb5#
      • 1...Ka4
        • 2.Sc6#
      • 1...Kb6!
    • 1.Bxd7?
      • threat
        • 2.Qb5#
        • 2.Qxc5#
      • 1...cxb4
        • 2.Qb5#
      • 1...Rc3
        • 2.Qb5#
      • 1...Kb6!
    • 1.Qxc5?
      • threat
        • 2.Bc6#
        • 2.Bxd7#
      • 1...d5
        • 2.Sc6#
        • 2.Bc6#
        • 2.Bd7#
        • 2.Be8#
      • 1...d6
        • 2.Sc6#
      • 1...Rc3!
  • Keys
    • 1.Ba4!
      • threat
        • 2.Qb5#
      • 1...Kxa4
        • 2.Sc6#
      • 1...Kb6
        • 2.Qa6#
      • 1...Rxa4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(b);P-FLIGHT::QAR(B)+S(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(A)::QAR1(B)
        • R(a);::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • P(d);N_GUARD::S(A)
      • Refutation
        • R(a);P_PINQ(B)
  • Actual
    • B(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);P-FLIGHT,XB(C)::QAR(B)+S(A)
      • K(b);S_FLIGHT::QAR1(B)
      • R(a);SBLOCK,XB(C)::QAR2(B),XP(c)
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