MESON Chess Problem Database

Problem Display
PID: 166843 (2r5/4p1p1/8/n3NRK1/r3kppp/2p3q1/b7/3Q2B1 w - - 0 1)

Petite, Efren

Arbejder-Skak, 1955

2r5/4p1p1/8/n3NRK1/r3kppp/2p3q1/b7/3Q2B1

#2

5 + 12

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Qd3#
    • 1...Qf2
      • 2.Qd3#
    • 1...Qh2
      • 2.Qd3#
    • 1...Qxg1
      • 2.Qd3#
    • 1...Qg2
      • 2.Qd3#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Ra3
      • 2.Qd4#
    • 1...Rd4
      • 2.Qxd4#
    • 1...Bc4
      • 2.Qd4#
    • 1...Sc4
      • 2.Qd4#
    • 1...f3
      • 2.Qd3#
  • Tries
    • 1.Qc2+?
      • 1...Qd3
        • 2.Qxd3#
      • 1...Kd5!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Re5#
      • 1...Rc5
        • 2.Sxc5#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sc6
        • 2.Sc5#
      • 1...f3
        • 2.Qc2#
      • 1...e5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(c);N_GUARD::QAB1(A)
    • Q(c);N_GUARD,XB(B)::QAB1(A)
    • Q(c);N_GUARD::QAB1(A),XQ(c)
    • R(d);N_GUARD::QAR1(A)
    • R(d);N_GUARD::QAR1(A),XR(d)
    • B(a);S_CUTR(d)::QAR1(A)
    • S(i);S_CUTR(d)::QAR1(A)
    • P(f);S_CUTQ(c)::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • R1(D)
    • Vars
      • R(l);N_GUARD,P_PINR(D)::S(C),XR(l)
      • S(i);S_CUTB(a)::QAB1(A)
      • S(i);S_CUTR(l)::S(C)
      • P(f);S_CUTQ(c)::QAB(A)
      • P(j);::R1(D),XP(j)
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).