MESON Chess Problem Database

Problem Display
PID: 16008 (1NQ1b3/4ppK1/1P1kp3/2pn3R/qPp1p3/b1rnPN2/8/3R4 w - - 0 1)

Surkov, Ruslan Albertovich

Die Schwalbe, 2000

1NQ1b3/4ppK1/1P1kp3/2pn3R/qPp1p3/b1rnPN2/8/3R4

#2

9 + 13

23 Die Schwalbe 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Se1
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Sb2
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Sf2
      • 2.Qxc5#
      • 2.Qc7#
    • 1...S3xb4
      • 2.Qc7#
    • 1...S3f4
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Se5
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Sxe3
      • 2.Qxc5#
      • 2.Qc7#
    • 1...S5xb4
      • 2.Qxc5#
      • 2.Qc7#
    • 1...S5f4
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Sxb6
      • 2.Qxc5#
    • 1...Sf6
      • 2.Qxc5#
      • 2.Qc7#
    • 1...Sc7
      • 2.Qxc7#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sxe4#
      • 1...Sf2
        • 2.Qxc5#
      • 1...Sf6
        • 2.Qc7#
      • 1...f5!
    • 1.Rxd5+?
      • 1...Kxd5
        • 2.Qxc5#
      • 1...exd5!
    • 1.bxc5+?
      • 1...Sxc5
        • 2.Qc7#
      • 1...Bxc5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sxe4#
      • 1...Ke5
        • 2.Sxf7#
      • 1...Sf6
        • 2.Qxc5#
      • 1...Sf2
        • 2.Qc7#
      • 1...f5
        • 2.Qxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(c);P_SPINS(h),XP(D)::QAB1(I)
    • S(h);P_SPINS(c),XP(F)::QAB1(I),XP(g)
    • S(h);N_GUARD,P_SPINS(c)::QAB1(I),XS(h)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C),XP(f)
      • Vars
        • S(c);N_GUARD::QAB1(I),XP(g)
        • S(h);N_GUARD::QAB1(I)
      • Refutation
        • P(l);
    • Try
      • R(E);CHECK,XS(h)
      • Vars
        • K(i);P-FLIGHT,P_SPINS(c),XR(E)::QAR1(I),XP(g)
      • Refutation
        • P(j);XR(E)
    • Try
      • P(D);CHECK,XP(g)
      • Vars
        • S(c);P_SPINS(h),XP(D)::QAB1(I)
      • Refutation
        • B(a);XP(D)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(f)
    • Vars
      • K(i);S_FLIGHT::R(E)+S(C),DCHECK,XP(l)
      • S(h);P_SPINS(c)::QAB1(I),XP(g)
      • S(c);P_SPINS(h)::QAB1(I)
      • P(l);N_GUARD::QAR1(I),XP(j)
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