MESON Chess Problem Database

Problem Display
PID: 233891 (3n4/2B3R1/5p2/3p1k2/1Rp2N2/3p3b/3N4/1Q2K3 w - - 0 1)

Hannemann, Knud Harald

Skakbladet, 1915

3n4/2B3R1/5p2/3p1k2/1Rp2N2/3p3b/3N4/1Q2K3

#2

7 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qxd3#
    • 1...d4
      • 2.Rb5#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Sg3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Bxf1!
    • 1.Sxc4?
      • threat
        • 2.Se3#
        • 2.Qxd3#
      • 1...Ke4
        • 2.Qxd3#
      • 1...Bf1
        • 2.Se3#
      • 1...Bg2
        • 2.Se3#
      • 1...d4
        • 2.Qxd3#
      • 1...dxc4!
    • 1.Se2?
      • threat
        • 2.Sd4#
      • 1...Ke6
        • 2.Sd4#
      • 1...Se6
        • 2.Sg3#
      • 1...d4
        • 2.Sxd4#
      • 1...Sc6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sg3#
      • 1...d2+
        • 2.Sxd2#
      • 1...Kxe4
        • 2.Qxd3#
      • 1...dxe4
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(c);N_GUARD::QAB(A),XP(a)
    • P(d);OGATEB::R(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(e);S_FLIGHT::QAB1(A),XP(a)
      • Refutation
        • B(b);XS(C)
    • Try
      • S(C);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAB1(A),XP(a)
        • B(b);::S(C)
        • P(d);::QAB(A),XP(a)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • K(e);N_SPINP(a),S_FLIGHT::S(E)
        • S(g);SBLOCK::S(E)
        • P(d);::S(E),XP(d)
      • Refutation
        • S(g);
  • Actual
    • S(C);N_PINP(a)
    • Threat
      • S(C)
    • Vars
      • P(a);CHECK::QAB(A)+S(C),XP(a)
      • K(e);OGATEB,P_SPINP(a),S_FLIGHT,XS(C)::QAB1(A),XP(a)
      • P(d);OGATEB,SBLOCK,XS(C)::R(D)
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