MESON Chess Problem Database

Problem Display
PID: 102201 (2R5/1KN1b2r/1Q2B3/8/1N3B2/2k2n2/5R2/nr1b4 w - - 0 1)

Back, Par-Erik

Sydsvenska Dagbladet Snallposten, 1937-1938

2R5/1KN1b2r/1Q2B3/8/1N3B2/2k2n2/5R2/nr1b4

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Scd5#
    • 1...Bb3
      • 2.Scd5#
    • 1...Bxb4
      • 2.Qe3#
    • 1...Bh4
      • 2.Qc5#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Bg5
      • 2.Qc5#
    • 1...Bf6
      • 2.Qc5#
    • 1...Bd8
      • 2.Qc5#
    • 1...Sb3
      • 2.Scd5#
    • 1...Se1
      • 2.Be5#
    • 1...Sg1
      • 2.Be5#
    • 1...Sd2
      • 2.Be5#
    • 1...Sh2
      • 2.Be5#
    • 1...Sh4
      • 2.Be5#
    • 1...Se5
      • 2.Bxe5#
    • 1...Sg5
      • 2.Be5#
  • Tries
    • 1.Be5+?
      • 1...Sd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...Sxe5!
    • 1.Rxf3+?
      • 1...Kb2
        • 2.Qd4#
      • 1...Bxf3+!
    • 1.Qc6+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Qc4#
      • 1...Bc5
        • 2.Qxc5#
      • 1...Kxb4!
  • Keys
    • 1.Rd2!
      • threat
        • 2.Sa2#
      • 1...Rxb4
        • 2.Sb5#
      • 1...Bxb4
        • 2.Qe3#
      • 1...Sxd2
        • 2.Be5#
      • 1...Rb2
        • 2.Rd3#
      • 1...Bb3
        • 2.Scd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • R(b);SBLOCK::R(H)+S(G),DCHECK
    • B(c);SBLOCK::R(H)+S(G),DCHECK
    • B(f);P_PINS(G),SBLOCK,XS(B)::QAR2(D)
    • B(f);N_GUARD,P_PINS(G)::QAR2(D)
    • B(f);N_GUARD,P_PINS(G)::QAR2(D),XB(f)
    • S(a);SBLOCK::R(H)+S(G),DCHECK
    • S(e);N_GUARD::B(C)
    • S(e);N_GUARD::B(C),XS(e)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • S(e);XB(C)
    • Try
      • R(A);CHECK,XS(e)
      • Vars
        • K(d);S_FLIGHT::QAB(D)
      • Refutation
        • B(c);CHECK,XR(A)
    • Try
      • Q(D);CHECK,P_SPINS(B)
      • Vars
        • B(f);N_GUARD,P_SPINB(f)::QAR2(D),XB(f)
      • Refutation
        • K(d);S_FLIGHT,XS(B)
  • Actual
    • R(A);
    • Threat
      • S(B)
    • Vars
      • R(b);P_PINQ(D),SBLOCK,XS(B)::R(H)+S(G),DCHECK
      • B(f);P_PINS(G),SBLOCK,XS(B)::QAR2(D)
      • S(e);N_GUARD,SBLOCK,XR(A)::B(C)
      • R(b);SBLOCK::R1(A)
      • B(c);SBLOCK::R(H)+S(G),DCHECK
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