MESON Chess Problem Database

Problem Display
PID: 203298 (4R3/4N3/2p2KQB/p1P1rP2/4k3/r2pP3/N1bp1R2/3q1nn1 w - - 0 1)

Hertmann, Sandor

Comm., Gyoeri Sakkoer, 1924

4R3/4N3/2p2KQB/p1P1rP2/4k3/r2pP3/N1bp1R2/3q1nn1

#2

10 + 11

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qg4
      • 2.Qxg4#
    • 1...Qa1
      • 2.Qg4#
    • 1...Qb1
      • 2.Qg4#
    • 1...Qc1
      • 2.Qg4#
    • 1...Qe1
      • 2.Qg4#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Ra4
      • 2.Sc3#
    • 1...Rxf5+
      • 2.Qxf5#
    • 1...Re6+
      • 2.fxe6#
    • 1...Bb3
      • 2.Sc3#
    • 1...Sxe3
      • 2.Rf4#
    • 1...Se2
      • 2.Qg2#
    • 1...Sf3
      • 2.Qg4#
  • Tries
    • 1.Rd8?
      • threat
        • 2.Rd4#
      • 1...Rxf5+
        • 2.Qxf5#
      • 1...Re6+
        • 2.fxe6#
      • 1...Sxe3
        • 2.Rf4#
      • 1...Qa1
        • 2.Qg4#
      • 1...Ra4
        • 2.Sc3#
      • 1...Se2
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg4#
      • 1...Rd5!
    • 1.Qg2+?
      • 1...Sf3
        • 2.Qg4#
      • 1...Qf3!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qc4#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Re6+
        • 2.Qxe6#
      • 1...Rxc5
        • 2.Sd5#
      • 1...Sxe3
        • 2.Rf4#
      • 1...Qa1
        • 2.Qg4#
      • 1...Rc3
        • 2.Sxc3#
      • 1...Ra4
        • 2.Sc3#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Bb3
        • 2.Sc3#
      • 1...Se2
        • 2.Qg2#
      • 1...Sf3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(a);N_GUARD::QAR2(G),XQ(a)
    • Q(a);N_GUARD::QAR2(G)
    • R(f);N_GUARD::S(A),XR(f)
    • R(f);N_GUARD::S(A)
    • R(j);CHECK,OGATE,P_SPINR(j),XP(E)::QAB1(G),XR(j)
    • R(j);CHECK,OGATE::QAB(G)+P(E),XR(j)
    • B(d);S_CUTR(f)::S(A)
    • S(b);SBLOCK,XP(C)::R1(B)
    • S(c);N_GUARD,S_CUTQ(a)::QAB(G)
    • S(c);S_CUTQ(a)::QAR2(G)
  • Tries
    • Try
      • R(J);
      • Threat
        • R1(J)
      • Vars
        • R(j);CHECK,OGATE,P_SPINR(j),XP(E)::QAB1(G),XR(j)
        • R(j);CHECK,OGATE::QAB(G)+P(E),XR(j)
        • S(b);SBLOCK,XP(C)::R1(B)
        • Q(a);N_GUARD::QAR2(G)
        • R(f);N_GUARD::S(A)
        • S(c);N_GUARD,S_CUTQ(a)::QAB(G)
        • S(c);S_CUTQ(a)::QAR2(G)
      • Refutation
        • R(j);
    • Try
      • Q(G);CHECK
      • Vars
        • S(c);P_SPINS(c),S_CUTQ(a)::QAR2(G)
      • Refutation
        • Q(a);P_PINP(E),P_SPINQ(a)
  • Actual
    • Q(G);
    • Threat
      • QAR2(G)
    • Vars
      • R(j);CHECK,XP(E)::R(J)+S(I),XR(j)
      • R(j);CHECK,OGATEB::QAR2(G),XR(j)
      • R(j);XP(D)::R(J)+S(I)
      • S(b);SBLOCK,XP(C)::R1(B)
      • Q(a);N_GUARD::QAR2(G)
      • R(f);N_GUARD::S(A),XR(f)
      • R(f);N_GUARD::S(A)
      • R(j);::R(J)+S(I),XR(j)
      • B(d);S_CUTR(f)::S(A)
      • S(c);N_GUARD,S_CUTQ(a)::QAB(G)
      • S(c);S_CUTQ(a)::QAR2(G)
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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).