MESON Chess Problem Database

Problem Display
PID: 164944 (bn1rr3/1N2pB2/2k2qQ1/B1N5/P7/6n1/1R1Rp2b/4K3 w - - 0 1)

Pituk, Alexander

Norsk Sjakkblad, 1937

bn1rr3/1N2pB2/2k2qQ1/B1N5/P7/6n1/1R1Rp2b/4K3

#2

9 + 10

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qd6
      • 2.Bd5#
    • 1...Rd5
      • 2.Bxd5#
    • 1...Rc8
      • 2.Bd5#
    • 1...Sd7
      • 2.Bd5#
  • Tries
    • 1.Sxd8+?
      • 1...Kxc5
        • 2.Rb5#
      • 1...Rxd8!
    • 1.Qe4+?
      • 1...Rd5
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Sxe4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Se5#
      • 1...Rxd7
        • 2.Rdc2#
      • 1...Bxb7
        • 2.Rbc2#
      • 1...Sxd7
        • 2.Bd5#
      • 1...Sf1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qg2#
      • 1...Sh5
        • 2.Qe4#
      • 1...e5
        • 2.Qc2#
      • 1...e6
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 3
  • Sets
    • Q(e);S_CUTR(i)::B(I)
    • R(i);N_GUARD::B(I),XR(i)
    • R(i);N_GUARD::B(I)
    • S(h);S_CUTR(i)::B(I)
  • Tries
    • Try
      • S(H);CHECK,XR(i)
      • Vars
        • K(d);N_SPINQ(e),P-FLIGHT,XS(F)::R1(B)
      • Refutation
        • R(j);XS(H)
    • Try
      • Q(G);CHECK,N_PINQ(e)
      • Refutation
        • S(c);XQ(G)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(i);SBLOCK,XS(F)::R(C)
      • B(g);SBLOCK,XS(H)::R(B)
      • S(h);SBLOCK,XS(F)::B(I)
      • S(c);N_GUARD::QAB(G)
      • S(c);N_GUARD::QAB(G),XS(c)
      • S(c);OGATE::QAB(G)
      • P(f);::QAR(G)
      • P(f);N_GUARD,N_SPINQ(e),S_CUTQ(e)::R1(C)
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