MESON Chess Problem Database

Problem Display
PID: 173103 (nK1Qb3/5p2/N1k1rRq1/5pP1/PBr1N3/1nb3P1/3P1P2/2R4B w - - 0 1)

Barulin, Mikhail Mikhailovich

6th Prize, Shakhmaty, 1928

nK1Qb3/5p2/N1k1rRq1/5pP1/PBr1N3/1nb3P1/3P1P2/2R4B

#2

13 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4+
      • 2.Sxb4#
    • 1...Rc5
      • 2.Sexc5#
    • 1...Rd6
      • 2.Qxd6#
    • 1...Bxd2
      • 2.Sxd2#
    • 1...Bxb4
      • 2.Sxb4#
    • 1...Bd4
      • 2.Sc3#
      • 2.Sec5#
    • 1...Be5+
      • 2.Sd6#
  • Tries
    • 1.Kxa8?
      • threat
        • 2.Sb8#
      • 1...Rxb4
        • 2.Sxb4#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Be5
        • 2.Sd6#
      • 1...Bd7!
    • 1.Rxe6+?
      • 1...fxe6
        • 2.Qd6#
      • 1...Qxe6!
    • 1.Qd5+?
      • 1...Kb6
        • 2.Qb7#
      • 1...Kxd5!
    • 1.Qxe8+?
      • 1...Kb6
        • 2.Qb5#
      • 1...Kd5!
  • Keys
    • 1.Ka7!
      • threat
        • 2.Sb8#
      • 1...Bd4+
        • 2.Sec5#
      • 1...Rxb4
        • 2.Sxb4#
      • 1...Rd6
        • 2.Qxd6#
      • 1...Bd7
        • 2.Qxa8#
      • 1...Be5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(c);CHECK,P_SPINB(b),XB(G)::S(J),XR(c)
    • R(c);N_GUARD::B(B)+S(H),XR(c)
    • R(f);N_GUARD::QAR1(M),XR(f)
    • B(b);N_SPINR(f),P_SPINR(c),XP(C)::B(B)+S(H),XB(b)
    • B(b);N_SPINR(f),P_SPINR(c),XB(G)::S(J),XB(b)
    • B(b);CHECK,N_SPINR(f),P_SPINR(c),S_CUTR(f)::B(B)+S(H)
  • Tries
    • Try
      • K(L);P-FLIGHT,XS(i)
      • Threat
        • S(J)
      • Vars
        • R(c);P_SPINB(b),XB(G)::S(J),XR(c)
        • R(f);N_GUARD::QAR1(M),XR(f)
        • B(b);N_SPINR(f),P_SPINR(c),S_CUTR(f)::B(B)+S(H)
      • Refutation
        • B(j);
    • Try
      • R(K);CHECK,XR(f)
      • Vars
        • P(h);XR(K)::QAR1(M)
      • Refutation
        • Q(g);XR(K)
    • Try
      • Q(M);CHECK
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(M)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT,XQ(M)
    • Try
      • Q(M);CHECK,XB(j)
      • Vars
        • K(e);OGATE,P-FLIGHT::QAR1(M)
      • Refutation
        • K(e);N_SPINR(f),S_FLIGHT
  • Actual
    • K(L);S_FLIGHT
    • Threat
      • S(J)
    • Vars
      • B(b);CHECK,N_SPINR(f),P_SPINR(c)::B(B)+S(H)
      • R(c);P_SPINB(b),XB(G)::S(J),XR(c)
      • R(f);N_GUARD::QAR1(M),XR(f)
      • B(j);SBLOCK::QAB(M),XS(i)
      • B(b);N_SPINR(f),P_SPINR(c),S_CUTR(f)::B(B)+S(H)
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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).