MESON Chess Problem Database

Problem Display
PID: 101353 (4n3/K2n3b/2p1N3/pk6/p1pQp2r/B1R2p1r/7p/6b1 w - - 0 1)

Hartong, Jan

Larsen, Karl Adolf Koefoed

Good Companions, 1920

4n3/K2n3b/2p1N3/pk6/p1pQp2r/B1R2p1r/7p/6b1

#2

5 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4+
      • 2.Sxd4#
    • 1...Sc5
      • 2.Qxc4#
    • 1...Sd6
      • 2.Sc7#
    • 1...Sf6
      • 2.Sc7#
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
    • 1...f2
      • 2.Qxc4#
    • 1...c5
      • 2.Qxd7#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Rb2#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...c5
        • 2.Qxd7#
      • 1...Sc5
        • 2.Qxc4#
      • 1...f2
        • 2.Qxc4#
      • 1...c3!
  • Keys
    • 1.Rc1!
      • threat
        • 2.Rb1#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...c5
        • 2.Qxd7#
      • 1...Sc5
        • 2.Qxc4#
      • 1...f2
        • 2.Qxc4#
      • 1...e3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);CHECK,XQ(C)::S(D),XB(a)
    • S(l);N_PINQ(C)::QAB1(C),XP(f)
    • S(n);N_GUARD::S(D)
    • S(n);N_GUARD::S(D),XS(n)
    • P(c);N_PINQ(C)::QAB1(C),XP(f)
    • P(k);N_PINQ(C)::QAB(C),XS(l)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)
      • Vars
        • B(a);CHECK,XQ(C)::S(D),XB(a)
        • P(k);N_PINQ(C)::QAB(C),XS(l)
        • S(l);N_PINQ(C)::QAB1(C),XP(f)
        • P(c);N_PINQ(C)::QAB1(C),XP(f)
      • Refutation
        • P(f);
  • Actual
    • R(B);
    • Threat
      • R(B)
    • Vars
      • B(a);CHECK,XQ(C)::S(D),XB(a)
      • P(k);N_PINQ(C)::QAB(C),XS(l)
      • S(l);N_PINQ(C)::QAB1(C),XP(f)
      • P(c);N_PINQ(C)::QAB1(C),XP(f)
      • P(g);N_PINQ(C)::QAR(C)
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