Problem Display
PID: 264833 (7K/b1p2N1B/5P2/q3Np2/1PP1kr2/2P1p1R1/2b1QppB/4nr2 w - - 0 1)

Murashev, Pavel Aleksandrovich

1/2 HM., 64 Shakhmatnoe obozrenie, 2022

7K/b1p2N1B/5P2/q3Np2/1PP1kr2/2P1p1R1/2b1QppB/4nr2

#2

11 + 12


SOLUTION


  • SOUND
  • Sets
    • 1...Qxe5
      • 2.Sg5#
    • 1...Rg4
      • 2.Rxg4#
      • 2.Qxg4#
    • 1...Bb8
      • 2.Rxe3#
      • 2.Qxe3#
    • 1...Sf3
      • 2.Qxc2#
    • 1...c5
      • 2.Rxe3#
      • 2.Qxe3#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sg5#
      • 1...Rxg4
        • 2.Rxg4#
      • 1...Sf3
        • 2.Qxc2#
      • 1...Rf3!
    • 1.Sg6?
      • threat
        • 2.Sg5#
      • 1...Sf3
        • 2.Qxc2#
      • 1...Rg4!
    • 1.Rf3?
      • threat
        • 2.Rxf4#
      • 1...Qxe5
        • 2.Sg5#
      • 1...Rxf3
        • 2.Sg5#
      • 1...Sxf3
        • 2.Qxc2#
      • 1...Rg4
        • 2.Bxf5#
      • 1...Rh4
        • 2.Sg5#
      • 1...Sd3!
    • 1.Qg4?
      • threat
        • 2.Bxf5#
      • 1...Rxg4
        • 2.Rxg4#
      • 1...Qxe5!
    • 1.Qxc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc2!
  • Keys
    • 1.Rg4!
      • threat
        • 2.Rxf4#
      • 1...Qxe5
        • 2.Sg5#
      • 1...Rxg4
        • 2.Qxg4#
      • 1...Sd3
        • 2.Qf3#

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(i);P_PINP(H),SBLOCK,XS(G)::S(I)
    • S(a);N_GUARD::QAB(A),XB(c)
  • Tries
    • Try
      • S(G);
      • Threat
        • S(I)
      • Vars
        • R(h);OGATE,XS(G)::R(D),XR(h)
        • S(a);N_GUARD::QAB(A),XB(c)
      • Refutation
        • R(h);
    • Try
      • S(G);
      • Threat
        • S(I)
      • Vars
        • S(a);N_GUARD::QAB(A),XB(c)
      • Refutation
        • R(h);
    • Try
      • R(D);
      • Threat
        • R1(D),XR(h)
      • Vars
        • Q(i);P_PINP(H),SBLOCK,XS(G)::S(I)
        • R(h);XR(D)::S(I)
        • S(a);N_GUARD,XR(D)::QAB(A),XB(c)
        • R(h);N_GUARD::B(J),XP(j)
        • R(h);P_PINB(J)::S(I)
      • Refutation
        • S(a);
    • Try
      • Q(A);N_PINP(f),P_PINP(j),P_PINR(h)
      • Threat
        • B(J),XP(j)
      • Vars
        • R(h);N_SPINR(h),OGATE,XQ(A)::R(D),XR(h)
      • Refutation
        • Q(i);P_PINP(H),XS(G)
    • Try
      • Q(A);CHECK,N_PINP(f),P_PINP(j),XB(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • R(D);P_PINR(h)
    • Threat
      • R1(D),XR(h)
    • Vars
      • Q(i);P_PINP(H),SBLOCK,XS(G)::S(I)
      • R(h);N_SPINR(h),OGATE,XR(D)::QAR2(A),XR(h)
      • S(a);N_GUARD::QAB1(A)


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).