MESON Chess Problem Database

Problem Display
PID: 194359 (1NBq3r/b1PP4/pkppN3/pb6/PR6/3n2Qp/7K/R7 w - - 0 1)

Svitek, Miroslav

Sachmatija, 2019

1NBq3r/b1PP4/pkppN3/pb6/PR6/3n2Qp/7K/R7

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd7
      • 2.Sxd7#
    • 1...Rh4
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Rh5
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Rh6
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Rh7
      • 2.cxd8Q#
      • 2.cxd8B#
    • 1...Bxb8
      • 2.cxb8Q#
    • 1...axb4
      • 2.a5#
    • 1...c5
      • 2.Qxd6#
  • Tries
    • 1.Rxb5+?
      • 1...cxb5
        • 2.Qxd6#
      • 1...axb5!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qxc6#
      • 1...Qxc7
        • 2.Qxc7#
      • 1...Qxd7
        • 2.Sxd7#
      • 1...Bxb8
        • 2.cxb8Q#
      • 1...Sxb4
        • 2.Qc5#
      • 1...axb4
        • 2.a5#
      • 1...Se5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(j);XP(H)::S(I),XQ(j)
    • R(k);N_GUARD::PXQ(j)=Q
    • B(i);OGATE,XS(I)::PXB(i)=Q
    • P(c);N_SPINB(d),OGATE,XR(E)::P(D)
    • P(g);OGATEB::QAR2(C),XP(h)
  • Tries
    • Try
      • R(E);CHECK,XB(d)
      • Vars
        • P(g);S_CUTP(e),XR(E)::QAR2(C),XP(h)
      • Refutation
        • P(e);XR(E)
  • Actual
    • Q(C);P_PINP(g),XP(h)
    • Threat
      • QAR1(C),XP(g)
    • Vars
      • Q(j);OGATE,P_PINQ(C),XP(G)::QAB1(C),XQ(j)
      • Q(j);XP(H)::S(I),XQ(j)
      • B(i);OGATE,XS(I)::PXB(i)=Q
      • S(a);N_GUARD,N_SPINB(d),XR(E)::QAB1(C)
      • P(c);N_SPINB(d),OGATE,XR(E)::P(D)
      • S(a);N_GUARD::QAB1(C)
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