MESON Chess Problem Database

Problem Display
PID: 178735 (8/8/8/2p5/2p5/2P2Q2/1K1k2p1/3B1bR1 w - - 0 1)

Asplund, Per Ivan Rune

Springaren, 1955

8/8/8/2p5/2p5/2P2Q2/1K1k2p1/3B1bR1

#2

5 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke1
      • 2.Qe2#
    • 1...Be2
      • 2.Qxe2#
    • 1...Bd3
      • 2.Qf4#
  • Tries
    • 1.Ba4?
      • 1...Ke1
        • 2.Qe3#
      • 1...Bd3
        • 2.Rd1#
      • 1...Be2!
    • 1.Rxg2+?
      • 1...Be2
        • 2.Qxe2#
      • 1...Bxg2
        • 2.Qe2#
      • 1...Ke1!
    • 1.Qe4?
      • 1...Be2
        • 2.Qxe2#
      • 1...Bd3
        • 2.Qe1#
        • 2.Qf4#
      • 1...Kxd1!
    • 1.Qf2+?
      • 1...Kd3
        • 2.Bc2#
      • 1...Be2
        • 2.Qxe2#
      • 1...Kxd1!
  • Keys
    • 1.Bc2!
      • 1...Ke1
        • 2.Qe3#
      • 1...Be2
        • 2.Qf4#
      • 1...Bd3
        • 2.Rd1#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINB(a),S_FLIGHT::QAR1(E)
    • B(a);N_GUARD::QAR1(E),XB(a)
    • B(a);SBLOCK::QAB(E)
  • Tries
    • Try
      • B(A);
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::QAR2(E)
        • B(a);OGATE::R1(B)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK,XP(c)
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(E),XB(a)
        • B(a);N_GUARD,XR(B)::QAR1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • B(a);N_GUARD::QAR1(E),XB(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINB(a),XB(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT::B(A)
        • B(a);N_GUARD,P_SPINB(a)::QAR1(E),XB(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINB(a),XB(A)
  • Actual
    • B(A);
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR2(E)
      • B(a);SBLOCK::QAB(E)
      • B(a);OGATE::R1(B)
HTML5 logo

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).