MESON Chess Problem Database

Problem Display
PID: 70574 (5N2/r2pn2K/1p1R1b2/pBkp4/P5nR/P5Bb/3Q4/4r3 w - - 0 1)

Wirtanen, Erkki Aukusti

Chess, 1951

5N2/r2pn2K/1p1R1b2/pBkp4/P5nR/P5Bb/3Q4/4r3

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Sxd7#
    • 1...Ra8
      • 2.Sxd7#
    • 1...Bc3
      • 2.Qxc3#
    • 1...Bxh4
      • 2.Qc3#
    • 1...Bg5
      • 2.Qc3#
    • 1...Sf5
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Sc6
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Sg6
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Sc8
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...Sg8
      • 2.Rxd5#
      • 2.Qxd5#
    • 1...d4
      • 2.Qc2#
  • Tries
    • 1.Qc2+?
      • 1...Bc3
        • 2.Qxc3#
      • 1...Kd4!
  • Keys
    • 1.Rxd7!
      • threat
        • 2.Bd6#
      • 1...Rxd7
        • 2.Sxd7#
      • 1...Re5
        • 2.Qc3#
      • 1...Re6
        • 2.Sxe6#
      • 1...Be5
        • 2.Se6#
      • 1...Se5
        • 2.Qd4#
      • 1...Sf5
        • 2.Qxd5#
      • 1...Sc8
        • 2.Qxd5#
      • 1...d4
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 5
  • Sets
    • R(i);N_GUARD::S(I),XP(j)
    • B(h);N_GUARD::QAR2(A),XB(h)
    • B(h);N_GUARD,XR(E)::QAR2(A)
    • B(h);N_GUARD::QAR2(A)
    • P(f);S_CUTB(h)::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::QAR2(A),XB(h)
      • Refutation
        • K(e);P_SPINP(f),P_SPINS(c),S_FLIGHT
  • Actual
    • R(G);XP(j)
    • Threat
      • B(C)
    • Vars
      • R(i);XR(G)::S(I),XR(i)
      • R(a);S_CUTB(h)::QAR2(A)
      • R(a);N_GUARD::S(I),XR(a)
      • B(h);S_CUTR(a)::S(I)
      • S(c);S_CUTB(h)::QAB1(A)
      • S(k);N_GUARD,P_PINR(G)::QAR1(A),XP(f)
      • P(f);S_CUTB(h)::QAR(A)
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