MESON Chess Problem Database

Problem Display
PID: 78909 (1Kn5/1Q3B2/3p3r/2k3p1/bp2nN1R/1r6/N7/3R4 w - - 0 1)

Lange, Hans Franz

Die Schwalbe, 1937

1Kn5/1Q3B2/3p3r/2k3p1/bp2nN1R/1r6/N7/3R4

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.Sd3#
    • 1...Sf6
      • 2.Se6#
  • Tries
    • 1.Sd3+?
      • 1...Kd4
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Rxd3!
    • 1.Se6+?
      • 1...Kc4
        • 2.Rd4#
        • 2.Rxe4#
        • 2.Qd5#
      • 1...Rxe6!
    • 1.Qxb4+?
      • 1...Kc6
        • 2.Be8#
      • 1...Rxb4+!
    • 1.Qc7+?
      • 1...Kb5
        • 2.Bc4#
      • 1...Bc6!
  • Keys
    • 1.Kc7!
      • threat
        • 2.Qd5#
      • 1...Rd3
        • 2.Qxb4#
      • 1...Sb6
        • 2.Qxb6#
      • 1...d5
        • 2.Qxd5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sc3
        • 2.Sd3#
      • 1...Sf6
        • 2.Se6#
      • 1...Se7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(d);S_CUTR(a)::S(C)
    • S(d);S_CUTR(h)::S(C)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • R(a);XS(C)
    • Try
      • S(C);CHECK
      • Refutation
        • R(h);XS(C)
    • Try
      • Q(E);CHECK,P_SPINQ(E),XP(c)
      • Vars
        • K(e);P-FLIGHT::B(F)
      • Refutation
        • R(a);CHECK,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);P-FLIGHT::B(F)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • QAR1(E)
    • Vars
      • R(a);N_GUARD::QAB1(E),XP(c)
      • S(i);N_GUARD::QAB1(E),XS(i)
      • P(g);::QAR1(E),XP(g)
      • B(b);N_GUARD::QAR1(E),XB(b)
      • S(d);S_CUTR(a)::S(C)
      • S(d);S_CUTR(h)::S(C)
      • S(i);N_GUARD::QAB1(E)
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