MESON Chess Problem Database

Problem Display
PID: 200576 (QB1RK2n/p3PRb1/2N1k3/2q5/4P1N1/7B/5r2/7r w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

The Problemist, 1983

QB1RK2n/p3PRb1/2N1k3/2q5/4P1N1/7B/5r2/7r

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Rd6#
    • 1...Qb6
      • 2.Rd6#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qxe7+
      • 2.Rxe7#
    • 1...Qc1
      • 2.Rd6#
    • 1...Qc2
      • 2.Rd6#
    • 1...Qc3
      • 2.Rd6#
    • 1...Qc4
      • 2.Rd6#
    • 1...Qa5
      • 2.Rd6#
    • 1...Qb5
      • 2.Rd6#
    • 1...Qd5
      • 2.exd5#
    • 1...Qf5
      • 2.Rd6#
    • 1...Qg5
      • 2.Rd6#
    • 1...Qh5
      • 2.Rd6#
    • 1...Qxc6+
      • 2.Qxc6#
  • Tries
    • 1.Sxf2+?
      • 1...Qf5
        • 2.Bxf5#
        • 2.Rd6#
        • 2.exf5#
      • 1...Rxh3!
    • 1.Sh2+?
      • 1...Qf5
        • 2.Rd6#
      • 1...Rf5!
    • 1.Sge5+?
      • 1...Rf5
        • 2.Bxf5#
        • 2.exf5#
      • 1...Rxh3!
    • 1.Bh2?
      • threat
        • 2.Qc8#
      • 1...Qxe7+
        • 2.Rxe7#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Qd4
        • 2.Sxf2#
      • 1...Qd6
        • 2.Sxf2#
        • 2.Rxd6#
      • 1...Qd5
        • 2.exd5#
      • 1...Rd2
        • 2.Sge5#
      • 1...Rd1!
    • 1.Bf4?
      • threat
        • 2.Qc8#
      • 1...Qxe7+
        • 2.Rxe7#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Qd4
        • 2.Sh2#
      • 1...Qd6
        • 2.Sh2#
        • 2.Rxd6#
      • 1...Qd5
        • 2.exd5#
      • 1...Rd1
        • 2.Sge5#
      • 1...Rd2!
    • 1.Rd7?
      • threat
        • 2.Sd8#
      • 1...Qxe7+
        • 2.Rdxe7#
        • 2.Rfxe7#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Qb6
        • 2.Rd6#
      • 1...Qa5
        • 2.Rd6#
      • 1...Sxf7!
  • Keys
    • 1.Be5!
      • threat
        • 2.Qc8#
      • 1...Qxe7+
        • 2.Rxe7#
      • 1...Qxc6+
        • 2.Qxc6#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Qd5
        • 2.exd5#
      • 1...Rd1
        • 2.Sxf2#
      • 1...Rd2
        • 2.Sh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(c);N_GUARD::R1(I)
    • Q(c);N_GUARD::R1(I),XQ(c)
    • Q(c);CHECK,OGATE,XP(E)::R1(F),XQ(c)
    • Q(c);N_GUARD,P_PINS(D)::R1(I)
    • Q(c);OGATE::P(B),XQ(c)
    • Q(c);N_GUARD,P_PINR(F)::R1(I)
    • Q(c);CHECK,OGATE,XS(D)::QAR2(G),XQ(c)
  • Tries
    • Try
      • S(C);CHECK,XR(b)
      • Refutation
        • R(a);XB(A)
    • Try
      • S(C);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::R1(I)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • S(C);CHECK
      • Refutation
        • R(a);XB(A)
    • Try
      • B(H);
      • Threat
        • QAB(G)
      • Vars
        • Q(c);CHECK,OGATE,XP(E)::R1(F),XQ(c)
        • Q(c);CHECK,OGATE,XS(D)::QAR2(G),XQ(c)
        • Q(c);N_GUARD::B(A)+S(C),XR(b)
        • Q(c);OGATE::P(B),XQ(c)
        • R(b);N_GUARD::B(A)+S(C)
      • Refutation
        • R(a);
    • Try
      • B(H);
      • Threat
        • QAB(G)
      • Vars
        • Q(c);CHECK,OGATE,XP(E)::R1(F),XQ(c)
        • Q(c);CHECK,OGATE,XS(D)::QAR2(G),XQ(c)
        • Q(c);N_GUARD::B(A)+S(C)
        • Q(c);OGATE::P(B),XQ(c)
        • R(a);N_GUARD::B(A)+S(C)
      • Refutation
        • R(b);
    • Try
      • R(I);
      • Threat
        • S(D)
      • Vars
        • Q(c);OGATE,P_PINR(I),XS(D)::QAR2(G),XQ(c)
        • Q(c);N_GUARD::R1(I)
      • Refutation
        • S(g);XR(F)
  • Actual
    • B(H);
    • Threat
      • QAB(G)
    • Vars
      • Q(c);CHECK,OGATE,XP(E)::R1(F),XQ(c)
      • Q(c);CHECK,OGATE,XS(D)::QAR2(G),XQ(c)
      • Q(c);N_GUARD::S(D),XQ(c)
      • Q(c);N_GUARD::R1(I),XQ(c)
      • Q(c);OGATE::P(B),XQ(c)
      • R(a);N_GUARD::B(A)+S(C),XR(b)
      • R(b);N_GUARD::B(A)+S(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).