MESON Chess Problem Database

Problem Display
PID: 170920 (5RnK/4N2p/rR6/1P2kp2/2Q5/3pN3/B3b3/5rnq w - - 0 1)

Bekkelund, Paul

1st Prize, Problemisten, 1949

5RnK/4N2p/rR6/1P2kp2/2Q5/3pN3/B3b3/5rnq

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rxf5#
    • 1...Rb1
      • 2.Rxf5#
    • 1...Rc1
      • 2.Rxf5#
    • 1...Rd1
      • 2.Rxf5#
    • 1...Re1
      • 2.Rxf5#
    • 1...Rxa2
      • 2.Re6#
    • 1...Ra3
      • 2.Re6#
    • 1...Ra4
      • 2.Re6#
    • 1...Ra5
      • 2.Re6#
    • 1...Ra7
      • 2.Re6#
    • 1...Ra8
      • 2.Re6#
    • 1...Bf3
      • 2.Rxf5#
    • 1...Sf3
      • 2.Rxf5#
    • 1...f4
      • 2.Rf5#
    • 1...h5
      • 2.Sg6#
    • 1...h6
      • 2.Sg6#
  • Tries
    • 1.S3xf5?
      • threat
        • 2.Qd4#
      • 1...Rxf5
        • 2.Rxf5#
      • 1...Qe4
        • 2.Qc7#
      • 1...Qh4
        • 2.Sc6#
      • 1...Rf4
        • 2.Qe6#
      • 1...Ra4
        • 2.Re6#
      • 1...Sf3
        • 2.Sc6#
      • 1...Qd5!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Qd4#
      • 1...Qe4
        • 2.Qc7#
      • 1...Qd5
        • 2.Rxd5#
      • 1...Qh4
        • 2.Rd5#
      • 1...Rf4
        • 2.Qe6#
      • 1...Ra4
        • 2.Re6#
      • 1...Sf3
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • R(a);N_GUARD::R1(G),XP(g)
    • R(h);N_GUARD,XB(A)::R1(E)
    • R(h);N_GUARD::R1(E)
    • B(d);S_CUTR(a)::R1(G),XP(g)
    • S(b);S_CUTR(a)::R1(G),XP(g)
    • P(g);S_CUTR(a)::R1(G)
    • P(i);N_GUARD::S(F)
  • Tries
    • Try
      • S(B);XP(g)
      • Threat
        • QAB1(C)
      • Vars
        • R(a);OGATE,XS(B)::R1(G),XR(a)
        • Q(c);SBLOCK::QAB(C)
        • Q(c);N_GUARD::S(F)
        • R(a);SBLOCK::QAR1(C)
        • R(h);N_GUARD::R1(E)
        • S(b);S_CUTQ(c)::S(F)
      • Refutation
        • Q(c);
  • Actual
    • R(G);
    • Threat
      • QAB1(C)
    • Vars
      • Q(c);SBLOCK::QAB(C)
      • Q(c);N_GUARD::R1(G),XQ(c)
      • Q(c);N_GUARD::R1(G)
      • R(a);SBLOCK::QAR1(C)
      • R(h);N_GUARD::R1(E)
      • S(b);S_CUTQ(c)::R1(G)
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