MESON Chess Problem Database

Problem Display
PID: 227455 (8/7K/8/RB1pN3/4k3/6Q1/8/8 w - - 0 1)

Schaffer, Hans

Das Ratsel, 1926

8/7K/8/RB1pN3/4k3/6Q1/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Bd3#
  • Tries
    • 1.Kg6?
      • 1...d4
        • 2.Bd3#
        • 2.Bc6#
      • 1...Kd4!
    • 1.Sg4?
      • 1...Kd4
        • 2.Qe3#
      • 1...d4
        • 2.Bd3#
        • 2.Bc6#
      • 1...Kf5!
    • 1.Sd7?
      • 1...Kd4
        • 2.Ra4#
        • 2.Qe5#
        • 2.Qd3#
      • 1...d4
        • 2.Bd3#
        • 2.Bc6#
      • 1...Kf5!
    • 1.Bd7?
      • 1...d4
        • 2.Qf3#
      • 1...Kd4!
    • 1.Qf2?
      • 1...d4
        • 2.Bd3#
        • 2.Bc6#
      • 1...Kxe5!
    • 1.Qg5?
      • 1...d4
        • 2.Bd3#
        • 2.Bc6#
      • 1...Kd4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qf4#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kf5
        • 2.Qg6#
      • 1...d4
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::B(C)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(C);
      • Vars
        • P(b);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT,XS(D)
    • Try
      • Q(A);
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAR1(A)
    • Vars
      • K(a);P-FLIGHT::QAB1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);OGATEB,SBLOCK::B(C)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).