MESON Chess Problem Database

Problem Display
PID: 275640 (2Q3Rb/qp1NBn2/3pr3/3P1k2/4Rp1P/3np2K/4NpB1/8 w - - 0 1)

Forster, Klaus

Die Schwalbe, 2023

2Q3Rb/qp1NBn2/3pr3/3P1k2/4Rp1P/3np2K/4NpB1/8

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sxe5#
    • 1...Rf6
      • 2.Sxf6#
    • 1...Rg6
      • 2.Sf6#
    • 1...Rh6
      • 2.Sf6#
    • 1...Sc1
      • 2.Rxf4#
    • 1...Se1
      • 2.Rxf4#
    • 1...Sb2
      • 2.Rxf4#
    • 1...Sb4
      • 2.Rxf4#
    • 1...Sc5
      • 2.Rxf4#
    • 1...Sde5
      • 2.Rxf4#
    • 1...Sfe5
      • 2.Rg5#
    • 1...Sg5+
      • 2.Rxg5#
    • 1...Sh6
      • 2.Rg5#
    • 1...Sd8
      • 2.Rg5#
    • 1...f3
      • 2.Sg3#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sd8
        • 2.Rg5#
      • 1...Sxc5!
    • 1.Sb6?
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sd8
        • 2.Rg5#
      • 1...Sc5!
    • 1.Sf6?
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sc5
        • 2.Sd4#
      • 1...Sd8
        • 2.Rg5#
      • 1...Bg7!
    • 1.Sb8?
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sd8
        • 2.Rg5#
      • 1...Sc5!
    • 1.Sf8?
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...Sd8
        • 2.Rg5#
      • 1...Sc5!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qxe6#
      • 1...Sg5+
        • 2.Rxg5#
      • 1...f3
        • 2.Sg3#
      • 1...Sc5
        • 2.Sd4#
      • 1...Sd8
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • R(g);::QAB(I)+S(G),XR(g)
    • R(g);::QAB(I)+S(G)
    • R(g);P_PINP(E)::QAB(I)+S(G)
    • S(b);N_GUARD::R1(D),XP(d)
    • S(j);N_GUARD::R1(J)
    • S(j);CHECK,N_GUARD::R1(J),XS(j)
    • P(d);N_GUARD::S(A)
  • Tries
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(I),XR(g)
      • Vars
        • S(j);CHECK,N_GUARD::R1(J),XS(j)
        • S(j);N_GUARD::R1(J)
      • Refutation
        • S(b);XS(G)
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(I),XR(g)
      • Vars
        • S(j);CHECK,N_GUARD::R1(J),XS(j)
        • S(j);N_GUARD::R1(J)
      • Refutation
        • S(b);
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(I),XR(g)
      • Vars
        • S(j);CHECK,N_GUARD::R1(J),XS(j)
        • S(b);S_CUTQ(h)::S(A)
        • S(j);N_GUARD::R1(J)
      • Refutation
        • B(k);
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(I),XR(g)
      • Vars
        • S(j);CHECK,N_GUARD::R1(J),XS(j)
        • S(j);N_GUARD::R1(J)
      • Refutation
        • S(b);
    • Try
      • S(G);P_PINR(g)
      • Threat
        • QAB1(I),XR(g)
      • Vars
        • S(j);CHECK,N_GUARD::R1(J),XS(j)
        • S(j);N_GUARD::R1(J)
      • Refutation
        • S(b);
  • Actual
    • S(G);P_PINR(g)
    • Threat
      • QAB1(I),XR(g)
    • Vars
      • S(j);CHECK,N_GUARD::R1(J),XS(j)
      • P(d);N_GUARD::S(A)
      • S(b);S_CUTQ(h)::S(A)
      • S(j);N_GUARD::R1(J)
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