MESON Chess Problem Database

Problem Display
PID: 268265 (3Q4/q7/3R1nrN/n3k3/pP1pp1p1/K2PN1P1/P7/5r2 w - - 0 1)

Bartels, Hermann

Die Schwalbe, 1931

3Q4/q7/3R1nrN/n3k3/pP1pp1p1/K2PN1P1/P7/5r2

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc5
      • 2.Sf7#
      • 2.Qe7#
    • 1...Qb6
      • 2.Sf7#
      • 2.Qe7#
    • 1...Qb8
      • 2.Sf7#
      • 2.Qe7#
    • 1...Qa6
      • 2.Sf7#
      • 2.Qe7#
    • 1...Qe7
      • 2.Qxe7#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qa8
      • 2.Sf7#
      • 2.Qe7#
    • 1...Sb3
      • 2.Sc4#
    • 1...Sc4+
      • 2.Sxc4#
    • 1...Sc6
      • 2.Sc4#
    • 1...Sb7
      • 2.Sc4#
      • 2.Sf7#
      • 2.Qe7#
  • Tries
    • 1.Rd5+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Sxd5!
    • 1.Qxa5+?
      • 1...Qc5
        • 2.Sc4#
        • 2.Sf7#
      • 1...Qxa5
        • 2.Sc4#
        • 2.Sf7#
      • 1...Sd5
        • 2.Sc4#
        • 2.Qxd5#
      • 1...Kxd6!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Re6#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Qxb6
        • 2.Sf7#
      • 1...dxe3
        • 2.d4#
      • 1...Sc6
        • 2.Sc4#
      • 1...Qd7
        • 2.Qxd4#
      • 1...Qe7
        • 2.Qxd4#
      • 1...Qf7
        • 2.Sxf7#
        • 2.Qxd4#
      • 1...Sd5
        • 2.Rxd5#
      • 1...Sh5
        • 2.Rd5#
      • 1...Sd7
        • 2.Rd5#
      • 1...Sh7
        • 2.Rd5#
      • 1...Se8
        • 2.Rd5#
      • 1...Sg8
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • Q(j);N_GUARD::QAR2(I),XQ(j)
    • Q(j);N_GUARD::S(H),XQ(j)
    • S(f);N_GUARD::S(D)
    • S(f);CHECK,N_GUARD::S(D),XS(f)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(g);P-FLIGHT::QAR1(I)
      • Refutation
        • S(h);XR(G)
    • Try
      • Q(I);CHECK,XS(f)
      • Refutation
        • K(g);S_FLIGHT,XR(G)
  • Actual
    • Q(I);
    • Threat
      • R1(G)
    • Vars
      • S(f);CHECK,N_GUARD::S(D),XS(f)
      • Q(j);N_GUARD,XQ(I)::S(H)
      • P(c);OGATE,XS(D)::P(C)
      • S(f);N_GUARD::S(D)
      • Q(j);N_GUARD::QAB1(I),XP(c)
      • S(h);N_GUARD::R1(G),XS(h)
      • S(h);N_GUARD::R1(G)
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