MESON Chess Problem Database

Problem Display
PID: 244470 (2K3B1/1nRQP3/5N2/pN1p3r/pkP3nR/7q/PPp4r/6B1 w - - 0 1)

Eerkes, Allard Pieter

Parallele 50, 1949

2K3B1/1nRQP3/5N2/pN1p3r/pkP3nR/7q/PPp4r/6B1

#2

12 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.bxa3#
    • 1...Qc3
      • 2.bxc3#
    • 1...Rxh4
      • 2.Sxd5#
    • 1...Rh6
      • 2.Sxd5#
    • 1...Rh7
      • 2.Sxd5#
    • 1...Rh8
      • 2.Sxd5#
    • 1...Se5
      • 2.Sxd5#
    • 1...Sd6+
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...dxc4
      • 2.Rxc4#
  • Tries
    • 1.Qd6+?
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sxd6+!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qb5#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Sxf6
        • 2.Sc6#
      • 1...dxc4
        • 2.Rxc4#
      • 1...Se3
        • 2.a3#
      • 1...Sf2
        • 2.Sxc2#
      • 1...Se5
        • 2.Sxd5#
      • 1...Sh6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(c);OGATE::P(C),XQ(c)
    • R(i);N_GUARD,XR(E)::S(G),XP(h)
    • R(i);N_GUARD::S(G),XP(h)
    • R(i);N_GUARD,P_PINB(L)::S(G),XP(h)
    • S(f);P_PINQ(I),S_CUTR(i)::S(G),XP(h)
    • S(j);CHECK,N_GUARD::QAB(I),XS(j)
    • S(j);N_GUARD::QAB(I)
    • P(h);OGATE,XP(D)::R1(H),XP(h)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB1(I),XS(j)
      • Refutation
        • S(j);CHECK,XQ(I)
  • Actual
    • S(F);
    • Threat
      • QAR1(I)
    • Vars
      • S(j);CHECK,N_GUARD::QAB(I),XS(j)
      • S(f);P_PINQ(I),XS(G)::S(F)
      • P(h);OGATE,XP(D)::R1(H),XP(h)
      • S(f);P_PINQ(I),S_CUTQ(c)::P(B)
      • S(f);P_PINQ(I),S_CUTR(b)::S(F),XP(a)
      • S(f);P_PINQ(I),S_CUTR(i)::S(G),XP(h)
      • S(f);P_PINQ(I)::S(F)
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