MESON Chess Problem Database

Problem Display
PID: 92907 (2B1R1b1/7p/2Q5/2NP2pN/5P1n/2Pp1k1P/K2Pp1r1/4B1bn w - - 0 1)

Hannelius, Jan Ingvar

Tidskrift for Schack, 1949

2B1R1b1/7p/2Q5/2NP2pN/5P1n/2Pp1k1P/K2Pp1r1/4B1bn

#2

12 + 10

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bh2
      • 2.Re3#
    • 1...Be3
      • 2.Rxe3#
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Be6
      • 2.dxe6#
    • 1...Sf2
      • 2.Re3#
    • 1...Sg3
      • 2.Bg4#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Be4#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Sf2
        • 2.Re3#
      • 1...Sg3
        • 2.Bg4#
      • 1...Sxf5!
    • 1.Be6?
      • threat
        • 2.d6#
      • 1...Bxe6
        • 2.dxe6#
      • 1...Sg3
        • 2.Bg4#
      • 1...Sf2!
    • 1.Re6?
      • threat
        • 2.d6#
      • 1...Bxe6
        • 2.dxe6#
      • 1...Sf2
        • 2.Re3#
      • 1...Sg3!
    • 1.Rxg8?
      • threat
        • 2.d6#
      • 1...Sg3
        • 2.Bg4#
      • 1...Sf2!
    • 1.Qe6?
      • threat
        • 2.Qe4#
      • 1...Sf2
        • 2.Qe3#
      • 1...Sg3
        • 2.Qg4#
      • 1...Bxe6!
  • Keys
    • 1.Se6!
      • threat
        • 2.d6#
      • 1...Ke4
        • 2.Sxg5#
      • 1...Bxe6
        • 2.dxe6#
      • 1...Sf2
        • 2.Sd4#
      • 1...Sg3
        • 2.Sxg5#

This anticipates 44796(1984)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::R1(L)
    • B(a);N_GUARD::R1(L),XB(a)
    • B(j);CHECK,OGATE,P_SPINB(j),XP(H)::QAB(J),XB(j)
    • B(j);::QAB(J)+P(H),XB(j)
    • S(b);S_CUTB(a)::R1(L)
    • S(b);S_CUTR(d)::B(K)
  • Tries
    • Try
      • B(K);
      • Threat
        • B(K)
      • Vars
        • B(j);CHECK,OGATE,P_SPINB(j),XP(H)::QAB(J),XB(j)
        • S(b);S_CUTB(a)::R1(L)
        • S(b);S_CUTR(d)::B(K)
      • Refutation
        • S(g);XB(K)
    • Try
      • B(K);N_SPINP(H)
      • Threat
        • QAB(J)+P(H)
      • Vars
        • B(j);OGATE,P_PINP(H),XB(K)::QAB(J)+P(H),XB(j)
        • S(b);S_CUTR(d)::B(K)
      • Refutation
        • S(b);
    • Try
      • R(L);N_SPINP(H)
      • Threat
        • QAB(J)+P(H)
      • Vars
        • B(j);OGATE,P_PINP(H),XR(L)::QAB(J)+P(H),XB(j)
        • S(b);S_CUTB(a)::R1(L)
      • Refutation
        • S(b);
    • Try
      • R(L);N_SPINP(H),XB(j)
      • Threat
        • QAB(J)+P(H)
      • Vars
        • S(b);S_CUTR(d)::B(K)
      • Refutation
        • S(b);
    • Try
      • Q(J);N_SPINP(H)
      • Threat
        • QAB1(J)
      • Vars
        • S(b);S_CUTB(a)::QAR1(J)
        • S(b);S_CUTR(d)::QAB1(J)
      • Refutation
        • B(j);P_PINP(H),XQ(J)
  • Actual
    • S(G);N_SPINP(H)
    • Threat
      • QAB(J)+P(H)
    • Vars
      • K(f);S_FLIGHT::R(L)+S(G),DCHECK,XP(h)
      • B(j);OGATE,P_PINP(H),XS(G)::QAB(J)+P(H),XB(j)
      • S(b);S_CUTB(a)::S(G)
      • S(b);S_CUTR(d)::S(G),XP(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).