MESON Chess Problem Database

Problem Display
PID: 231532 (8/8/8/2n4p/2Q4K/5k2/4R3/8 w - - 0 1)

Pikler, Robert

Magyar Sakkvilag, 1927

8/8/8/2n4p/2Q4K/5k2/4R3/8

#2

3 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sa4
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sa6
      • 2.Qe4#
    • 1...Se6
      • 2.Qe4#
    • 1...Sb7
      • 2.Qe4#
    • 1...Sd7
      • 2.Qe4#
  • Tries
    • 1.Kxh5?
      • threat
        • 2.Qg4#
      • 1...Kg3
        • 2.Qg4#
      • 1...Se4!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Qf7#
      • 1...Se4
        • 2.Qxe4#
      • 1...Kxe2!
    • 1.Qe6?
      • threat
        • 2.Qe3#
      • 1...Kf4
        • 2.Rf2#
        • 2.Qf7#
        • 2.Qf6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sxe6!
    • 1.Qc1?
      • threat
        • 2.Qe3#
        • 2.Qf1#
      • 1...Sd3
        • 2.Qe3#
      • 1...Se4
        • 2.Qe3#
      • 1...Kxe2!
    • 1.Qb4?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sa4
        • 2.Qe4#
      • 1...Sa6
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#
      • 1...Sb7
        • 2.Qe4#
      • 1...Sd7
        • 2.Qe4#
      • 1...Kxe2!
    • 1.Qd4?
      • threat
        • 2.Rf2#
        • 2.Qf2#
        • 2.Qe3#
      • 1...Se4
        • 2.Qe3#
        • 2.Qxe4#
      • 1...Sd3
        • 2.Qe3#
        • 2.Qe4#
      • 1...Kxe2!
    • 1.Qxc5?
      • threat
        • 2.Qf2#
        • 2.Qe3#
      • 1...Kf4
        • 2.Qf2#
        • 2.Qf8#
      • 1...Kxe2!
  • Keys
    • 1.Kh3!
      • 1...Sd3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sb3
        • 2.Qe4#
      • 1...Sa4
        • 2.Qe4#
      • 1...Sa6
        • 2.Qe4#
      • 1...Se6
        • 2.Qe4#
      • 1...Sb7
        • 2.Qe4#
      • 1...Sd7
        • 2.Qe4#
      • 1...h4
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAB1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
  • Tries
    • Try
      • K(C);P-FLIGHT,XP(c)
      • Threat
        • QAB1(B)
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • S(b);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(B)
        • S(b);N_GUARD,P_SPINS(b)::QAB1(B),XS(b)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
      • Refutation
        • S(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAR1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);
      • Vars
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
    • Try
      • Q(B);XS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • K(a);S_FLIGHT,XR(A)
  • Actual
    • K(C);P-FLIGHT
    • Vars
      • S(b);N_GUARD::QAB1(B)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • P(c);N_GUARD::QAB1(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).