MESON Chess Problem Database

Problem Display
PID: 218297 (2R3B1/6p1/n6q/p1ppB2n/P1kpN2Q/p2N2p1/P5P1/3R3K w - - 0 1)

Racz, Erich

Deutsche Schachzeitung, 1975

2R3B1/6p1/n6q/p1ppB2n/P1kpN2Q/p2N2p1/P5P1/3R3K

#2

11 + 11

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Rxc5#
    • 1...Sb8
      • 2.Rxc5#
  • Tries
    • 1.Sb2+?
      • 1...axb2
        • 2.Rxd4#
      • 1...Kb4!
    • 1.Sdxc5?
      • threat
        • 2.Rxd4#
      • 1...Kb4
        • 2.Rxd4#
      • 1...Qc1
        • 2.Sxa6#
      • 1...Qe3
        • 2.Sxa6#
      • 1...d3
        • 2.Sd2#
        • 2.Sd6#
      • 1...Qd2!
    • 1.Sd6+?
      • 1...Qxd6
        • 2.Qxd4#
      • 1...Kc3!
  • Keys
    • 1.Sexc5!
      • threat
        • 2.Qxd4#
      • 1...Kc3
        • 2.Se4#
      • 1...Qe3
        • 2.Sxa6#
      • 1...Qf4
        • 2.Sxa6#
      • 1...Sf4
        • 2.Rc1#
      • 1...Sf6
        • 2.Sxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • S(i);N_GUARD::R1(J),XP(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • P(a);XS(E)::R1(A),XP(d)
      • Refutation
        • K(c);N_SPINP(f),P-FLIGHT
    • Try
      • S(E);P_PINP(g),XP(f)
      • Threat
        • R1(A),XP(d)
      • Vars
        • K(c);N_SPINP(g),P-FLIGHT::R(A),XP(d)
        • Q(j);N_GUARD,P_PINR(A)::R(J)+S(E),XS(i)
        • Q(j);N_GUARD::R(J)+S(E),XS(i)
      • Refutation
        • Q(j);
    • Try
      • S(G);CHECK,N_PINP(f),P_PINP(d)
      • Vars
        • Q(j);XS(G)::QAR1(H),XP(d)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(G);P_PINP(d),XP(f)
    • Threat
      • QAR1(H),XP(d)
    • Vars
      • K(c);P-FLIGHT::R(J)+S(G),DCHECK
      • Q(j);N_GUARD::R(J)+S(G),XS(i)
      • Q(j);N_GUARD,N_SPINP(d),P_SPINP(g)::R(J)+S(G),XS(i)
      • S(h);N_SPINP(d),P_PINQ(H),P_SPINP(g),S_CUTQ(j)::R(A)
      • S(h);P_PINQ(H),S_CUTQ(j)::R(J)+S(G),XS(i)
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