MESON Chess Problem Database

Problem Display
PID: 156525 (1N5n/3pQp1B/5Bp1/2pk3b/4RPn1/6K1/p7/8 w - - 0 1)

Andersson, Sven Tore

Source?, 1969

1N5n/3pQp1B/5Bp1/2pk3b/4RPn1/6K1/p7/8

#2

7 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Qe5#
    • 1...Sh2
      • 2.Qe5#
    • 1...Se3
      • 2.Qe5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sxf6
      • 2.Qe5#
    • 1...Sh6
      • 2.Qe5#
    • 1...c4
      • 2.Rd4#
    • 1...g5
      • 2.Qxd7#
    • 1...d6
      • 2.Qb7#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Qxd7#
      • 1...Sxf6
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...c4
        • 2.Rb5#
      • 1...d6
        • 2.Qe4#
      • 1...cxb4!
  • Keys
    • 1.Ra4!
      • threat
        • 2.Qxd7#
      • 1...Sxf6
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...c4
        • 2.Ra5#
      • 1...d6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • S(b);N_GUARD::QAR1(E)
    • S(b);N_GUARD::QAR1(E),XS(b)
    • S(b);N_GUARD,XB(D)::QAR1(E)
    • P(c);N_GUARD::R1(B)
    • P(f);::QAR2(E),XP(g)
    • P(g);OGATE,SBLOCK::QAB(E)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR2(E),XP(g)
      • Vars
        • S(b);N_GUARD,XB(D)::QAR1(E)
        • S(b);N_GUARD::QAR1(E),XS(b)
        • P(c);OGATEB,SBLOCK::R(B)
        • P(g);SBLOCK::QAB1(E)
      • Refutation
        • P(c);XR(B)
  • Actual
    • R(B);
    • Threat
      • QAR2(E),XP(g)
    • Vars
      • S(b);N_GUARD,XB(D)::QAR1(E)
      • S(b);N_GUARD::QAR1(E),XS(b)
      • P(c);OGATEB,SBLOCK::R(B)
      • P(g);SBLOCK::QAB1(E)
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Developed and maintained by Brian Stephenson.
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