MESON Chess Problem Database

Problem Display
PID: 6989 (b4Rqr/pk3N1Q/p3Kp2/P4P2/4N3/8/4r3/2R3BB w - - 0 1)

Adabashev, Mark Ivanovich

2nd Place, La Settimana Enigmistica, 1935

b4Rqr/pk3N1Q/p3Kp2/P4P2/4N3/8/4r3/2R3BB

#2

10 + 8

15148 Sadier Collection 2014
136 Problem Observer 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf7+
      • 2.Qxf7#
    • 1...Qxh7
      • 2.Sd6#
    • 1...Qxg1
      • 2.Sd6#
    • 1...Qg2
      • 2.Sd6#
    • 1...Qg3
      • 2.Sd6#
    • 1...Qg4
      • 2.Sd6#
    • 1...Qg5
      • 2.Sd6#
    • 1...Qg6
      • 2.Sd6#
    • 1...Qg7
      • 2.Sd6#
    • 1...Ra2
      • 2.Sd6#
    • 1...Rb2
      • 2.Sd6#
    • 1...Rd2
      • 2.Sd6#
    • 1...Rf2
      • 2.Sd6#
    • 1...Rg2
      • 2.Sd6#
    • 1...Rh2
      • 2.Sd6#
    • 1...Rxe4+
      • 2.Bxe4#
  • Tries
    • 1.Rb8+?
      • 1...Qxb8
        • 2.Sd6#
        • 2.Sd8#
      • 1...Kxb8!
    • 1.Qxg8?
      • threat
        • 2.Sd6#
        • 2.Rb8#
      • 1...Rxe4+
        • 2.Bxe4#
      • 1...Rxg8
        • 2.Sd6#
      • 1...Rd2
        • 2.Sed6#
        • 2.Rb8#
      • 1...Rc2!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Rc7#
      • 1...Qxf7+
        • 2.Rxf7#
        • 2.Qxf7#
      • 1...Rxe4+
        • 2.Bxe4#
      • 1...Qxf8
        • 2.Sd8#
      • 1...Rxh2
        • 2.Sd6#
      • 1...Rc2
        • 2.Sc5#
      • 1...Qg3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • Q(g);CHECK,OGATE,P_SPINQ(g),XS(H)::QAR(I),XQ(g)
    • Q(g);XQ(I)::S(H)
    • Q(g);XB(B)::QAR(I)+S(H),DCHECK
    • Q(g);::QAR(I)+S(H),DCHECK
    • Q(g);P_PINP(F)::QAR(I)+S(H),DCHECK
    • Q(g);::S(H)
    • R(a);N_PINS(D),P_PINS(H)::B(C)+S(D),DCHECK
    • R(a);N_PINS(D),P_PINS(H)::S(D)
    • R(a);CHECK,OGATE,P_PINS(H),P_SPINR(a),XS(D)::B(C),XR(a)
  • Tries
    • Try
      • R(J);CHECK
      • Refutation
        • K(e);P-FLIGHT,XR(J)
    • Try
      • Q(I);XQ(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::B(C),XR(a)
        • R(h);XQ(I)::S(H)
      • Refutation
        • R(a);N_PINS(D)
  • Actual
    • B(B);
    • Threat
      • R1(A)
    • Vars
      • R(a);CHECK,OGATE,P_PINS(H),P_SPINR(a),XS(D)::B(C),XR(a)
      • Q(g);XR(J)::QAR(I)+S(H),DCHECK
      • R(a);N_PINS(D),P_PINS(H),XB(B)::B(C)+S(D),DCHECK
      • R(a);N_PINS(D),P_PINS(H)::B(C)+S(D),DCHECK
      • Q(g);::QAR(I)+S(H),DCHECK
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).