MESON Chess Problem Database

Problem Display
PID: 202566 (b7/3K1pp1/pR2N3/1p2k1P1/1NP1r1Pb/2PBr1n1/5Q2/4R1B1 w - - 0 1)

Clark, Robert Winslow

Brisbane Courier, 1923

b7/3K1pp1/pR2N3/1p2k1P1/1NP1r1Pb/2PBr1n1/5Q2/4R1B1

#2

12 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3+
      • 2.Sxd3#
    • 1...Rf3
      • 2.Qd4#
    • 1...Rd4+
      • 2.cxd4#
    • 1...Rf4
      • 2.Qxf4#
    • 1...Bc6+
      • 2.Sxc6#
    • 1...Sf1
      • 2.Qf5#
    • 1...Sh1
      • 2.Qf5#
    • 1...Se2
      • 2.Qf5#
    • 1...Sf5
      • 2.Qxf5#
    • 1...Sh5
      • 2.Qf5#
    • 1...fxe6
      • 2.Rxe6#
    • 1...g6
      • 2.Qf6#
  • Tries
    • 1.Rxe3?
      • threat
        • 2.Qf4#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...fxe6
        • 2.Rxe6#
      • 1...Se2
        • 2.Qf5#
      • 1...Sh5
        • 2.Qf5#
      • 1...Bxg5!
    • 1.Rxb5+?
      • 1...Bd5
        • 2.Sc6#
        • 2.Rxd5#
      • 1...axb5!
    • 1.Qxg3+?
      • 1...Rxg3
        • 2.Bd4#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Bxg3!
    • 1.Qxf7?
      • threat
        • 2.Qxg7#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rd4+
        • 2.cxd4#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...Rf3
        • 2.Bd4#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sh5
        • 2.Qf5#
      • 1...g6
        • 2.Qf6#
        • 2.Qg7#
      • 1...Bxg5!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Qf5#
      • 1...Rxd3+
        • 2.Sxd3#
      • 1...Rd4+
        • 2.cxd4#
      • 1...Bc6+
        • 2.Sxc6#
      • 1...fxe6
        • 2.Rxe6#
      • 1...Rf3
        • 2.Qd4#
      • 1...Rf4
        • 2.Qxf4#
      • 1...f5
        • 2.Qxf5#
      • 1...g6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(a);CHECK,P_SPINR(c),XB(E)::S(F),XR(a)
    • R(a);OGATE,P_SPINR(c)::QAB1(C)
    • R(c);CHECK,OGATE,P_SPINR(a)::P(D),XR(c)
    • R(c);N_GUARD,P_SPINR(a)::QAB1(C),XR(c)
    • B(j);CHECK,N_GUARD::S(F),XB(j)
    • S(b);N_GUARD::QAR1(C)
    • S(b);N_GUARD::QAR1(C),XS(b)
    • P(h);OGATE,XS(K)::R1(J),XP(h)
    • P(i);N_GUARD::QAB1(C)
  • Tries
    • Try
      • R(A);P_PINR(c),XR(a)
      • Threat
        • QAB1(C)
      • Vars
        • B(j);CHECK,N_GUARD::S(F),XB(j)
        • P(h);OGATE,XS(K)::R1(J),XP(h)
        • S(b);N_GUARD::QAR1(C)
      • Refutation
        • B(d);XP(I)
    • Try
      • R(J);CHECK,XP(e)
      • Refutation
        • P(g);XR(J)
    • Try
      • Q(C);CHECK,XS(b)
      • Vars
        • R(a);OGATE,P_SPINR(c),XQ(C)::B(B)
        • R(c);N_GUARD,P_SPINR(a)::QAB1(C),XR(c)
      • Refutation
        • B(d);XQ(C)
    • Try
      • Q(C);XP(h)
      • Threat
        • QAB(C),XP(i)
      • Vars
        • R(a);CHECK,P_SPINR(c),XB(E)::S(F),XR(a)
        • R(c);CHECK,OGATE,P_SPINR(a)::P(D),XR(c)
        • B(j);CHECK,N_GUARD::S(F),XB(j)
        • R(a);OGATE,P_SPINR(c)::B(B)
        • R(c);N_GUARD,P_SPINR(a)::QAB1(C),XR(c)
        • S(b);N_GUARD::QAR1(C),XS(b)
        • S(b);N_GUARD::QAR1(C)
      • Refutation
        • B(d);XP(I)
  • Actual
    • B(B);P_PINS(b)
    • Threat
      • QAR1(C)
    • Vars
      • R(a);CHECK,P_SPINR(c),XB(E)::S(F),XR(a)
      • R(c);CHECK,OGATE,P_SPINR(a)::P(D),XR(c)
      • B(j);CHECK,N_GUARD::S(F),XB(j)
      • P(h);OGATE,XS(K)::R1(J),XP(h)
      • R(a);OGATE,P_SPINR(c)::QAB1(C)
      • R(c);N_GUARD,N_SPINS(b),P_SPINR(a)::QAB1(C),XR(c)
      • P(h);::QAR1(C),XP(h)
      • P(i);N_GUARD::QAB1(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).