MESON Chess Problem Database

Problem Display
PID: 227126 (3RNN1K/r5Q1/p2B1p2/3k4/Bnp1r1b1/1P1nPP2/qb6/3R4 w - - 0 1)

Fastosky, Pedro

The Problemist, 1955

3RNN1K/r5Q1/p2B1p2/3k4/Bnp1r1b1/1P1nPP2/qb6/3R4

#2

11 + 11

15601 Albrecht-Leiss-Degener Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sxf6#
    • 1...Re5
      • 2.Sxf6#
    • 1...Rc7
      • 2.Sxc7#
    • 1...Ra8
      • 2.Sc7#
    • 1...Bc1
      • 2.Sxf6#
    • 1...Ba3
      • 2.Sxf6#
    • 1...c3
      • 2.Sxf6#
  • Tries
    • 1.Qxa7?
      • threat
        • 2.Sc7#
        • 2.Qc5#
      • 1...Qxa4
        • 2.Qc5#
      • 1...Rxe8
        • 2.Qc5#
      • 1...cxb3
        • 2.Qc5#
      • 1...Bd7
        • 2.Qc5#
      • 1...Rd4
        • 2.Sxf6#
        • 2.Sc7#
      • 1...Re7
        • 2.Qc5#
      • 1...Bd4
        • 2.Sc7#
      • 1...f5+!
    • 1.Qb7+?
      • 1...Sc6
        • 2.Sc7#
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...Rxb7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qa5#
        • 2.Qc5#
      • 1...f5+
        • 2.Be5#
      • 1...Qxa4
        • 2.Qc5#
      • 1...Rxe3
        • 2.Qxc4#
        • 2.Qc5#
      • 1...Rxc7
        • 2.Sxc7#
      • 1...cxb3
        • 2.Qc5#
      • 1...Bd7
        • 2.Qc5#
      • 1...Rd4
        • 2.Sxf6#
      • 1...Rb7
        • 2.Qc5#
      • 1...Bd4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...a5
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(f);N_SPINS(c),S_CUTB(b)::S(I),XP(j)
    • R(f);S_CUTB(b)::S(I),XP(j)
    • R(k);N_GUARD::S(I),XR(k)
    • R(k);N_GUARD::S(I)
    • B(b);N_GUARD::S(I),XP(j)
    • P(e);S_CUTB(b)::S(I),XP(j)
  • Tries
    • Try
      • Q(G);XR(k)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XB(E)::QAR1(G)
        • R(f);P_PINS(J),XS(I)::QAR1(G)
        • P(e);XP(B)::QAR1(G)
        • B(g);::QAR1(G)
        • R(f);::QAR1(G)
        • B(b);N_SPINS(c)::S(I)
      • Refutation
        • P(j);CHECK
    • Try
      • Q(G);CHECK
      • Refutation
        • R(k);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • P(j);CHECK,S_CUTB(g)::R(H)+B(F)
      • Q(a);XB(E)::QAR1(G)
      • R(k);XQ(G)::S(I),XR(k)
      • P(e);XP(B)::QAR1(G)
      • B(g);::QAR1(G)
      • R(f);N_SPINS(c),S_CUTB(b)::S(I),XP(j)
      • R(k);::QAR1(G)
      • B(b);N_SPINS(c),S_CUTR(f)::QAB1(G),XP(e)
      • P(i);::QAR1(G)
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