MESON Chess Problem Database

Problem Display
PID: 140297 (7b/4pK2/1q2p3/1p6/1B6/1bR2Qp1/N1Pk1r1N/4R2r w - - 0 1)

Pugachev, Sergey Timofeevich

Shakhmaty v SSSR, 1949

7b/4pK2/1q2p3/1p6/1B6/1bR2Qp1/N1Pk1r1N/4R2r

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe1
      • 2.Re3#
    • 1...Rhxh2
      • 2.Rd1#
    • 1...Re2
      • 2.Qxe2#
    • 1...Rg2
      • 2.Qd1#
    • 1...Rfxh2
      • 2.Qd1#
    • 1...Rxf3+
      • 2.Sxf3#
    • 1...Bxc2
      • 2.Rd3#
    • 1...Bf6
      • 2.Qd1#
    • 1...e5+
      • 2.Rc4#
  • Tries
    • 1.Re2+?
      • 1...Kd1
        • 2.Rd3#
      • 1...Rxe2!
    • 1.Qxf2+?
      • 1...gxf2
        • 2.Sf3#
      • 1...Qxf2+!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Qd1#
      • 1...Bxc2+
        • 2.Rd3#
      • 1...e5+
        • 2.Rc6#
      • 1...Kxe1
        • 2.Re3#
      • 1...Rxe1
        • 2.Qd3#
      • 1...Rxf3
        • 2.Sxf3#
      • 1...Re2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(b);S_FLIGHT,XR(A)::B(G)+R(E),DCHECK
    • R(a);N_GUARD,XS(D)::R1(A)
    • R(c);N_PINQ(F)::QAR1(F),XR(c)
    • R(c);N_PINQ(F)::QAR1(F)
    • R(c);N_PINQ(F),XS(D)::QAR1(F)
    • R(c);CHECK,XQ(F)::S(D),XR(c)
    • B(d);SBLOCK,XP(C)::B(G)+R(E),DCHECK
    • B(j);N_PINQ(F)::QAR1(F)
    • P(h);CHECK,S_CUTB(j)::B(G)+R(E)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(E)
      • Refutation
        • R(c);N_PINQ(F),XR(A)
    • Try
      • Q(F);CHECK,N_SPINQ(F),XR(c)
      • Vars
        • P(e);XQ(F)::S(D)
      • Refutation
        • Q(g);CHECK,XQ(F)
  • Actual
    • K(H);N_SPINQ(F),S_FLIGHT
    • Threat
      • QAR1(F)
    • Vars
      • B(d);CHECK,SBLOCK,XP(C)::B(G)+R(E),DCHECK
      • P(h);CHECK,S_CUTB(j)::B(G)+R(E)
      • K(b);S_FLIGHT,XR(A)::B(G)+R(E),DCHECK
      • R(a);SBLOCK,XR(A)::QAR1(F)
      • R(c);XQ(F)::S(D),XR(c)
      • R(c);N_GUARD::QAR1(F),XR(c)
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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).