MESON Chess Problem Database

Problem Display
PID: 205779 (1Q2R3/1p2N2K/7p/5p2/1P2kr2/R1b5/3PPn2/1Nr3B1 w - - 0 1)

Rauch, Meir

2nd HM., Arbeiter Schach Internationale, 1925

1Q2R3/1p2N2K/7p/5p2/1P2kr2/R1b5/3PPn2/1Nr3B1

#2

10 + 8

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxf4#
    • 1...Sd1
      • 2.d3#
    • 1...Sh1
      • 2.d3#
    • 1...Sh3
      • 2.d3#
    • 1...Sg4
      • 2.d3#
  • Tries
    • 1.Sxc3+?
      • 1...Kd4
        • 2.Qxf4#
      • 1...Rxc3!
    • 1.Sc6+?
      • 1...Be5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kd5!
    • 1.Qxb7+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke5!
    • 1.d3+?
      • 1...Ke3
        • 2.Sxf5#
      • 1...Kd4
        • 2.Qxf4#
      • 1...Sxd3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe5#
      • 1...Ke3
        • 2.Sxf5#
      • 1...Kxd4
        • 2.Qxf4#
      • 1...Bxd4
        • 2.Sd2#
      • 1...Sd3
        • 2.Qxb7#
      • 1...Sg4
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(d);P-FLIGHT,P_SPINS(b)::QAR2(I),XR(e)
    • S(b);N_GUARD::P(C)
  • Tries
    • Try
      • S(A);CHECK,XB(c)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::QAR2(I),XR(e)
      • Refutation
        • R(a);XS(A)
    • Try
      • S(G);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(I);CHECK,XP(h)
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::QAR1(I)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • P(C);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::R(J)+S(G),DCHECK,XP(f)
        • K(d);P-FLIGHT,P_SPINS(b)::QAR2(I),XR(e)
      • Refutation
        • S(b);XP(C)
  • Actual
    • P(C);
    • Threat
      • QAR1(I)
    • Vars
      • K(d);P-FLIGHT,P_SPINB(c),P_SPINS(b)::R(J)+S(G),DCHECK,XP(f)
      • K(d);P-FLIGHT,P_SPINS(b),XP(C)::QAR2(I),XR(e)
      • B(c);N_GUARD,SBLOCK,XP(C)::S(A)
      • S(b);::QAB(I),XP(h)
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