MESON Chess Problem Database

Problem Display
PID: 270730 (3RR1B1/8/p1rN4/pP1p1PN1/1Qpkp1rn/1P4b1/4K3/1n2B3 w - - 0 1)

Svitek, Miroslav

Die Schwalbe, 2023

3RR1B1/8/p1rN4/pP1p1PN1/1Qpkp1rn/1P4b1/4K3/1n2B3

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Be5
      • 2.Se6#
    • 1...Sa3
      • 2.Bc3#
    • 1...Sc3+
      • 2.Bxc3#
    • 1...Sxf5
      • 2.Sxf5#
    • 1...axb5
      • 2.Sxb5#
  • Tries
    • 1.Sdxe4?
      • threat
        • 2.Rxd5#
      • 1...Rxe4+
        • 2.Rxe4#
      • 1...Sc3+
        • 2.Bxc3#
        • 2.Qxc3#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rd6
        • 2.Qc5#
      • 1...Bd6
        • 2.Bf2#
      • 1...Re6!
    • 1.Bf2+?
      • 1...e3
        • 2.Bxe3#
      • 1...Bxf2!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Rxd5#
      • 1...Sc3+
        • 2.Bxc3#
      • 1...Rc5
        • 2.Se6#
      • 1...Rd6
        • 2.Sxa5#
      • 1...Re6
        • 2.Sxe6#
      • 1...Bd6
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(b);SBLOCK::S(G)
    • S(a);N_GUARD::B(A)
    • S(a);CHECK,N_GUARD::B(A),XS(a)
    • S(g);XP(F)::S(H),XS(g)
    • P(j);XP(E)::S(H),XP(j)
  • Tries
    • Try
      • S(H);XP(e)
      • Threat
        • R1(I),XP(i)
      • Vars
        • R(f);CHECK,OGATE,XS(H)::R1(J),XR(f)
        • R(k);N_GUARD::QAB1(D),XR(k)
        • R(k);N_GUARD::QAB1(D)
        • B(b);N_GUARD::B(A)
      • Refutation
        • R(k);P_PINS(H)
    • Try
      • B(A);CHECK
      • Vars
        • P(e);N_SPINP(c),P_SPINP(e)::B(A),XP(e)
      • Refutation
        • B(b);XB(A)
  • Actual
    • S(H);P_PINP(i),XP(c)
    • Threat
      • R1(I),XP(i)
    • Vars
      • S(a);CHECK,N_GUARD::B(A),XS(a)
      • R(k);N_GUARD::S(G)
      • R(k);N_GUARD,N_SPINP(i)::QAR(D)+S(H),XP(h)
      • R(k);N_GUARD::S(G),XR(k)
      • B(b);N_SPINP(i),S_CUTR(k)::S(G)
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