MESON Chess Problem Database

Problem Display
PID: 251722 (K2n4/R1pnP1p1/1p3p2/2PkP1N1/B1p2RN1/8/5B2/1Q1r1b1q w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

Die Schwalbe, 2021

K2n4/R1pnP1p1/1p3p2/2PkP1N1/B1p2RN1/8/5B2/1Q1r1b1q

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qg1
      • 2.Qe4#
    • 1...Qh2
      • 2.Qe4#
    • 1...Qh3
      • 2.Qe4#
    • 1...Qh4
      • 2.Qe4#
    • 1...Qh5
      • 2.Qe4#
    • 1...Qh6
      • 2.Qe4#
    • 1...Qh8
      • 2.Qe4#
    • 1...c6
      • 2.Rxd7#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qxd7#
      • 1...Sxc5
        • 2.Se3#
      • 1...Sxe5
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sb8
        • 2.exf6#
        • 2.e6#
      • 1...Sf8
        • 2.exf6#
        • 2.e6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sb7
        • 2.Qe6#
      • 1...Sf7
        • 2.Qe6#
      • 1...Rd4!
    • 1.exd8Q?
      • threat
        • 2.Qxd7#
        • 2.Qg8#
      • 1...b5
        • 2.Qxd7#
      • 1...Qh5
        • 2.Qe4#
        • 2.Qxd7#
      • 1...Qh7
        • 2.Qxd7#
      • 1...Qh8
        • 2.Qe4#
      • 1...Rd4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd7#
      • 1...Sxc5
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Sxe5
        • 2.Se3#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Sb8
        • 2.c6#
      • 1...Sf8
        • 2.c6#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb7
        • 2.Qc6#
      • 1...Sf7
        • 2.Qc6#
      • 1...c6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_GUARD::QAB1(A),XQ(c)
    • Q(c);N_GUARD::QAB1(A)
    • P(h);OGATE::R(I),XS(i)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XS(i)
      • Vars
        • S(i);SBLOCK,XP(F)::S(E)
        • S(i);P_SPINS(i),XP(G)::PXS(k)=Q
        • S(k);N_GUARD::QAB1(A),XS(k)
        • S(k);N_GUARD::QAB1(A)
      • Refutation
        • R(a);
    • Try
      • P(J);P_PINS(i),XS(k)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::QAR2(J),XS(i)
        • Q(c);::QAR2(J),XS(i)
        • Q(c);N_GUARD,P_PINQ(J)::QAB1(A)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A),XS(i)
    • Vars
      • S(i);P_SPINS(i),XP(F)::PXS(k)=Q
      • S(i);SBLOCK,XP(G)::S(E)
      • R(a);N_GUARD::R1(D),XR(a)
      • S(i);N_GUARD::QAR(A)+P(F)
      • S(k);N_GUARD::QAB1(A),XS(k)
      • S(k);N_GUARD::QAB1(A)
      • P(h);OGATE::R(I),XS(i)
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