MESON Chess Problem Database

Problem Display
PID: 270694 (N1R5/1P1p4/b2p4/3k4/2p2K2/2R2n1B/1r1P1B1p/n2Q1N1q w - - 0 1)

Paslack, Rainer

Die Schwalbe, 2023

N1R5/1P1p4/b2p4/3k4/2p2K2/2R2n1B/1r1P1B1p/n2Q1N1q

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf1
      • 2.Qxf3#
    • 1...Qg1
      • 2.Qxf3#
    • 1...Ra2
      • 2.Sb6#
    • 1...Rc2
      • 2.Sb6#
    • 1...Rxd2
      • 2.Sb6#
    • 1...Rb6
      • 2.Sxb6#
    • 1...Bb5
      • 2.Sb6#
    • 1...Sb3
      • 2.Sb6#
    • 1...Se1
      • 2.Qh5#
    • 1...Sg1
      • 2.Qh5#
    • 1...Sxd2
      • 2.Qh5#
    • 1...Sd4
      • 2.Se3#
  • Tries
    • 1.Bxd7?
      • threat
        • 2.Sc7#
      • 1...Sd4
        • 2.Se3#
      • 1...Rxb7!
    • 1.Rd3+?
      • 1...Sd4
        • 2.Se3#
        • 2.Rxd4#
        • 2.Qh5#
      • 1...cxd3!
    • 1.R8xc4?
      • threat
        • 2.Se3#
        • 2.Sc7#
      • 1...Qxf1
        • 2.Sc7#
        • 2.Qxf3#
      • 1...Rxb7
        • 2.Se3#
      • 1...Sc2
        • 2.Sc7#
      • 1...Bxc4!
    • 1.Qa4?
      • threat
        • 2.Sc7#
      • 1...Rb5
        • 2.Qxc4#
      • 1...Bb5
        • 2.Sb6#
      • 1...Sd4
        • 2.Se3#
      • 1...Rxb7!
    • 1.d4?
      • threat
        • 2.Se3#
      • 1...Qxf1
        • 2.Qxf3#
      • 1...cxd4 ep
        • 2.Sc7#
      • 1...Rd2
        • 2.Sb6#
      • 1...Re2
        • 2.Sb6#
      • 1...Sd2
        • 2.Qh5#
      • 1...Sc2!
  • Keys
    • 1.d3!
      • threat
        • 2.dxc4#
      • 1...cxd3
        • 2.Sc7#
      • 1...Rd2
        • 2.Sb6#
      • 1...Sd2
        • 2.Qh5#
      • 1...Sd4
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 9
  • Sets
    • Q(b);N_GUARD,XS(B)::QAB(A),XS(e)
    • Q(b);N_GUARD::QAB(A),XS(e)
    • R(c);N_GUARD::S(I)
    • R(c);N_GUARD,P_SPINR(c),XP(C)::S(I)
    • R(c);N_GUARD::S(I),XR(c)
    • B(h);S_CUTR(c)::S(I)
    • S(a);S_CUTR(c)::S(I)
    • S(e);OGATE::QAR(A)
    • S(e);OGATE,P_SPINS(e),XP(C)::QAR(A)
    • S(e);SBLOCK::S(B)
  • Tries
    • Try
      • B(F);XP(j)
      • Threat
        • S(I)
      • Vars
        • S(e);SBLOCK::S(B)
      • Refutation
        • R(c);XP(H)
    • Try
      • R(E);CHECK
      • Refutation
        • P(f);XR(E)
    • Try
      • R(J);XP(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XP(H)::S(B)
        • S(a);::S(I)
      • Refutation
        • B(h);XR(J)
    • Try
      • Q(A);
      • Threat
        • S(I)
      • Vars
        • R(c);S_CUTB(h)::QAB1(A),XP(f)
        • B(h);S_CUTR(c)::S(I)
        • S(e);SBLOCK::S(B)
      • Refutation
        • R(c);XP(H)
    • Try
      • P(C);
      • Threat
        • S(B)
      • Vars
        • Q(b);N_GUARD,XS(B)::QAB(A),XS(e)
        • P(f);EP,P_SPINP(f),XP(C)::S(I)
        • R(c);N_GUARD::S(I)
        • S(e);OGATE::QAR(A)
      • Refutation
        • S(a);
  • Actual
    • P(C);
    • Threat
      • QAR(A)+P(C)DCHECK,XP(f)
    • Vars
      • P(f);P_SPINP(f),XP(C)::S(I)
      • R(c);N_GUARD::S(I)
      • S(e);OGATE::QAR(A)
      • S(e);SBLOCK::S(B)
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