MESON Chess Problem Database

Problem Display
PID: 261118 (1r1N1n1K/n3p3/1B1k1Np1/b7/1r1q4/8/b7/2RRQ2B w - - 0 1)

Felber, Stefan

Neue Zurcher Zeitung, 2015

1r1N1n1K/n3p3/1B1k1Np1/b7/1r1q4/8/b7/2RRQ2B

#2

8 + 10

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sf7#
    • 1...Rb3
      • 2.Sf7#
      • 2.Rxd4#
    • 1...Rc4
      • 2.Sf7#
    • 1...Rb7
      • 2.Sxb7#
    • 1...Ra8
      • 2.Sb7#
    • 1...Rc8
      • 2.Sb7#
    • 1...Bb1
      • 2.Sf7#
    • 1...Be6
      • 2.Qg3#
    • 1...Bf7
      • 2.Sxf7#
    • 1...Sb5
      • 2.Rc6#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Sc8
      • 2.Rc6#
  • Tries
    • 1.Rxd4+?
      • 1...Bd5
        • 2.Sf7#
        • 2.Rxd5#
      • 1...Rxd4!
    • 1.Qxb4+?
      • 1...Bxb4
        • 2.Bc7#
      • 1...Ke5!
  • Keys
    • 1.Rc7!
      • threat
        • 2.Qxe7#
      • 1...exf6
        • 2.Qg3#
        • 2.Qe7#
      • 1...Be6
        • 2.Qg3#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Sc8
        • 2.Rc6#
      • 1...Se6
        • 2.Rd7#
      • 1...Sd7
        • 2.Rxd7#
      • 1...e5
        • 2.Se8#
      • 1...e6
        • 2.Sf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • Q(c);N_PINS(F),S_CUTB(a)::S(G)
    • R(b);S_CUTB(a)::S(G)
    • R(i);N_GUARD::S(G),XR(i)
    • R(i);N_GUARD::S(G)
    • B(a);N_GUARD::S(G)
    • B(a);S_CUTP(h)::QAB(C)
    • B(a);N_GUARD::S(G),XB(a)
    • S(g);N_GUARD::R1(A)
    • S(g);N_GUARD::R1(A),XS(g)
  • Tries
    • Try
      • R(B);CHECK,N_SPINS(F),XQ(c)
      • Refutation
        • R(b);XR(B)
    • Try
      • Q(C);CHECK,XR(b)
      • Vars
        • B(d);XQ(C)::B(E)
      • Refutation
        • K(e);N_PINS(F),N_SPINQ(c),S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB1(C),XP(h)
    • Vars
      • B(a);S_CUTP(h)::QAB(C)
      • S(g);N_GUARD::R1(A),XS(g)
      • S(g);N_GUARD::R1(A)
      • S(j);N_GUARD::R1(A)
      • S(j);N_GUARD::R1(A),XS(j)
      • P(h);N_PINS(F)::S(F)
      • P(h);S_CUTB(a)::S(G)
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