MESON Chess Problem Database

Problem Display
PID: 140143 (4R1B1/2r2r2/3p2p1/N2k1nQp/1P1P3p/3R1K1N/7b/7n w - - 0 1)

Willems, PJH

Probleemblad, 1975

4R1B1/2r2r2/3p2p1/N2k1nQp/1P1P3p/3R1K1N/7b/7n

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Bxf7#
    • 1...Rc2
      • 2.Bxf7#
    • 1...Rc3
      • 2.Bxf7#
    • 1...Rc4
      • 2.Bxf7#
    • 1...Rc5
      • 2.Bxf7#
      • 2.dxc5#
    • 1...Rc6
      • 2.Bxf7#
    • 1...Rc8
      • 2.Bxf7#
    • 1...Bg1
      • 2.Sf4#
    • 1...Bf4
      • 2.Sxf4#
    • 1...Sg3
      • 2.Sf4#
  • Tries
    • 1.Qxf5+?
      • 1...Be5
        • 2.Sf4#
        • 2.dxe5#
      • 1...gxf5!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Ke2#
      • 1...Se3+
        • 2.Kxe3#
      • 1...Sfg3+
        • 2.Sf4#
      • 1...Sxd4+
        • 2.Ke3#
      • 1...Se7+
        • 2.Bxf7#
      • 1...Re7
        • 2.Qa2#
      • 1...Rc2
        • 2.Bxf7#
      • 1...Sf2
        • 2.Kxf2#
      • 1...Shg3
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(i);N_GUARD::B(I),XR(j)
    • R(i);N_GUARD,P_PINR(A)::B(I),XR(j)
    • B(b);N_GUARD::S(C)
    • B(b);N_GUARD::S(C),XB(b)
    • S(a);S_CUTB(b)::S(C)
  • Tries
    • Try
      • Q(G);CHECK,P_SPINQ(G),XS(e)
      • Refutation
        • P(h);XQ(G)
  • Actual
    • Q(G);N_PINS(e)
    • Threat
      • QAB(G)+K(B)
    • Vars
      • S(e);CHECK::QAB(G)+K(B),XS(e)
      • S(e);CHECK,S_CUTB(b)::S(C)
      • S(e);CHECK,P_SPINS(e),XP(E)::QAB(G)+K(B)
      • S(e);CHECK,S_CUTR(i)::B(I),XR(j)
      • R(i);N_GUARD::QAB(G)
      • R(i);N_GUARD::B(I),XR(j)
      • S(a);::QAB(G)+K(B),XS(a)
      • S(a);S_CUTB(b)::S(C)
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Developed and maintained by Brian Stephenson.
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