MESON Chess Problem Database

Problem Display
PID: 235510 (NNnr4/8/8/pk6/p2PPp2/2P4p/Q2RKP1r/2q1BB1b w - - 0 1)

Dikusarov, Andrey Nikolayovich

Schach, 2007

NNnr4/8/8/pk6/p2PPp2/2P4p/Q2RKP1r/2q1BB1b

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Kd1#
      • 2.Rxb2#
    • 1...Qxd2+
      • 2.Kxd2#
    • 1...Qa3
      • 2.Kd1#
    • 1...Qd1+
      • 2.Kxd1#
    • 1...Qxe1+
      • 2.Kxe1#
    • 1...Rxf2+
      • 2.Kxf2#
    • 1...Rg2
      • 2.Kf3#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Re8
      • 2.Qd5#
    • 1...Rf8
      • 2.Qd5#
    • 1...Rg8
      • 2.Qd5#
    • 1...Rh8
      • 2.Qd5#
    • 1...Bf3+
      • 2.Kxf3#
    • 1...Sb6
      • 2.Sc7#
    • 1...Sd6
      • 2.Qd5#
    • 1...a3
      • 2.Qb3#
    • 1...f3+
      • 2.Ke3#
  • Tries
    • 1.Qb2+?
      • 1...Qxb2
        • 2.Kd1#
      • 1...Kc4!
    • 1.c4+?
      • 1...Kb4
        • 2.Rb2#
      • 1...Qxc4+!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Qc4#
      • 1...Qxd2+
        • 2.Kxd2#
      • 1...Qb1+
        • 2.Qxb1#
      • 1...Qc2+
        • 2.Kxc2#
      • 1...Qxc3+
        • 2.Kxc3#
      • 1...Rxd4+
        • 2.Kxd4#
      • 1...Bxe4+
        • 2.Kxe4#
      • 1...Sb6
        • 2.Sc7#
      • 1...Sd6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 13
  • Sets
    • Q(a);CHECK,XR(D)::B(B)+K(E),XQ(a)
    • Q(a);::B(B)+K(E)
    • Q(a);CHECK::B(B)+K(E),XQ(a)
    • Q(a);CHECK,XB(A)::B(B)+K(E),XQ(a)
    • R(c);CHECK,XP(F)::B(B)+K(E),XR(c)
    • R(c);::B(B)+K(E)
    • R(j);N_GUARD::QAR2(C),XR(j)
    • R(j);N_GUARD::QAR2(C)
    • B(b);CHECK::B(B)+K(E),XB(b)
    • S(i);SBLOCK::S(J)
    • S(i);S_CUTR(j)::QAR2(C)
    • P(e);N_GUARD::QAR2(C)
    • P(f);CHECK::B(B)+K(E)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • Q(a);P_PINR(D),XQ(C)::B(B)+K(E)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • P(G);CHECK
      • Vars
        • K(h);P-FLIGHT::B(A)+R(D),DCHECK
      • Refutation
        • Q(a);CHECK,XP(G)
  • Actual
    • K(E);N_SPINP(F),P_SPINP(H),S_FLIGHT
    • Threat
      • QAB1(C)
    • Vars
      • Q(a);CHECK,XR(D)::B(B)+K(E),XQ(a)
      • Q(a);CHECK,N_GUARD::QAR(C),XQ(a)
      • Q(a);CHECK::B(B)+K(E),XQ(a)
      • Q(a);CHECK,XP(G)::B(B)+K(E),XQ(a)
      • R(j);CHECK,XP(H)::B(B)+K(E),XR(j)
      • B(b);CHECK,XP(I)::B(B)+K(E),XB(b)
      • S(i);SBLOCK::S(J)
      • S(i);N_PINP(H),S_CUTR(j)::QAR2(C)
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).