MESON Chess Problem Database

Problem Display
PID: 264016 (1N6/2Q1P3/1Rb2pB1/b2k4/1P1P1p2/1prR4/7B/5N1K w - - 0 1)

Klein, Laszlo

4th Comm., Tijdschrift vd KNSB, 1940

1N6/2Q1P3/1Rb2pB1/b2k4/1P1P1p2/1prR4/7B/5N1K

#2

11 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4+
      • 2.Qxc6#
    • 1...Ke6+
      • 2.d5#
    • 1...Ba4
      • 2.Rd6#
    • 1...Bb5
      • 2.Rd6#
    • 1...Bb7
      • 2.Rd6#
    • 1...Bd7
      • 2.Rd6#
    • 1...Ba8
      • 2.Rd6#
    • 1...Be8
      • 2.Rd6#
  • Tries
    • 1.Se3+?
      • 1...Ke6+
        • 2.d5#
      • 1...fxe3!
    • 1.Be4+?
      • 1...Kc4
        • 2.Sd2#
        • 2.Qxc6#
      • 1...Ke6
        • 2.e8Q#
        • 2.e8R#
      • 1...Kxe4!
    • 1.Qd6+?
      • 1...Kc4+
        • 2.Qxc6#
      • 1...Kxd6+!
    • 1.Qd7+?
      • 1...Kc4+
        • 2.Qxc6#
      • 1...Bxd7!
    • 1.e8Q?
      • threat
        • 2.Bf7#
        • 2.Qef7#
        • 2.Qg8#
      • 1...Kc4+
        • 2.Qexc6#
        • 2.Qcxc6#
      • 1...Bxe8
        • 2.Rd6#
      • 1...Bd7
        • 2.Be4#
        • 2.Rd6#
        • 2.Qexd7#
        • 2.Qe4#
      • 1...f5
        • 2.Bf7#
      • 1...Rxd3!
    • 1.e8R?
      • threat
        • 2.Bf7#
      • 1...Kc4+
        • 2.Qxc6#
      • 1...Bxe8
        • 2.Rd6#
      • 1...Bd7
        • 2.Be4#
        • 2.Rd6#
      • 1...Rxd3!
  • Keys
    • 1.Qxf4!
      • threat
        • 2.Bf7#
      • 1...Kc4+
        • 2.d5#
      • 1...Ke6+
        • 2.Qe4#
      • 1...Bd7
        • 2.Se3#
      • 1...Be8
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(e);CHECK,P_SPINB(f),S_CUTR(b),S_FLIGHT::QAR2(I),XB(f)
    • K(e);CHECK,OGATE,P_SPINB(f),S_FLIGHT::P(F)
    • B(f);OGATE::R1(G)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(e);CHECK,OGATE,P_SPINB(f),S_FLIGHT::P(F)
      • Refutation
        • P(c);XS(A)
    • Try
      • B(H);CHECK
      • Vars
        • K(e);N_GUARD,P_PINB(H),P_SPINB(f),S_FLIGHT::P=Q
      • Refutation
        • K(e);S_FLIGHT,XB(H)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,S_CUTR(b),S_FLIGHT::QAR2(I),XB(f)
      • Refutation
        • K(e);CHECK,P-FLIGHT,P_SPINB(f),P_SPINP(c),XQ(I)
    • Try
      • Q(I);CHECK
      • Vars
        • K(e);CHECK,S_CUTR(b),S_FLIGHT::QAR2(I),XB(f)
      • Refutation
        • B(f);XQ(I)
    • Try
      • P(J);
      • Threat
        • DUALS(3)
      • Vars
        • B(f);OGATE,XQ(J)::R1(G)
        • P(g);::B(H)
      • Refutation
        • R(b);XR(D)
    • Try
      • P(J);
      • Threat
        • B(H)
      • Vars
        • K(e);CHECK,P_SPINB(f),S_CUTR(b),S_FLIGHT::QAR2(I),XB(f)
        • B(f);OGATE,XR(J)::R1(G)
      • Refutation
        • R(b);XR(D)
  • Actual
    • Q(I);XP(c)
    • Threat
      • B(H)
    • Vars
      • K(e);CHECK,OGATE,S_FLIGHT::QAR(I)+P(F)
      • K(e);CHECK,N_GUARD,P_SPINB(f),S_FLIGHT::QAR2(I)
      • B(f);::S(A)
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).