MESON Chess Problem Database

Problem Display
PID: 272404 (8/8/2N5/1b1np1B1/p3n3/K2k1pq1/B1R1p3/4QN2 w - - 0 1)

Kern, W

Sunday Referee, 1934

(First published on Sun Jun 10 1934)

8/8/2N5/1b1np1B1/p3n3/K2k1pq1/B1R1p3/4QN2

#2

7 + 9

15239 Valois Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc2
      • 2.Bb1#
    • 1...f2
      • 2.Qxe2#
  • Tries
    • 1.Bc4+?
      • 1...Kxc2
        • 2.Qc1#
      • 1...Bxc4!
    • 1.Rd2+?
      • 1...Kc3
        • 2.Qa1#
        • 2.Qc1#
      • 1...Sxd2!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Qb1#
      • 1...Qxe1
        • 2.Sxe5#
      • 1...Bxc4
        • 2.Bb1#
      • 1...exf1Q
        • 2.Qxf1#
        • 2.Qxe4#
      • 1...exf1S
        • 2.Qxf1#
        • 2.Qxe4#
      • 1...exf1B
        • 2.Qxf1#
        • 2.Qxe4#
      • 1...exf1R
        • 2.Qxf1#
        • 2.Qxe4#
      • 1...Sec3
        • 2.Qd2#
      • 1...Sdc3
        • 2.Sb4#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Se3
        • 2.Sb4#
      • 1...Sb4
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(D)::B(C)
    • P(c);N_GUARD::QAB1(A),XP(a)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • K(b);S_CUTB(g),S_FLIGHT,XR(D)::QAR1(A)
      • Refutation
        • B(g);XB(C)
    • Try
      • R(D);CHECK
      • Refutation
        • S(f);XR(D)
  • Actual
    • R(D);
    • Threat
      • QAB(A)
    • Vars
      • Q(d);N_GUARD,XQ(A)::S(G),XP(i)
      • B(g);SBLOCK,XR(D)::B(C)
      • S(f);N_GUARD::QAR1(A)
      • S(h);N_GUARD::S(G)
      • S(f);N_GUARD::QAR1(A),XS(f)
      • S(h);N_GUARD::S(G),XS(h)
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