MESON Chess Problem Database

Problem Display
PID: 186688 (3R4/2p5/BNpp3K/nnb3p1/2R1P3/1p1kp3/1Q2N2p/7q w - - 0 1)

Stoyanov, Kiril N

Chess, 1960

3R4/2p5/BNpp3K/nnb3p1/2R1P3/1p1kp3/1Q2N2p/7q

#2

8 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qg2
      • 2.Sc1#
    • 1...Qf3
      • 2.Sc1#
    • 1...Qxe4
      • 2.Sc1#
      • 2.Rc3#
    • 1...Qc1
      • 2.Sxc1#
    • 1...Ba3
      • 2.Rd4#
    • 1...Bb4
      • 2.Rd4#
    • 1...Bd4
      • 2.Rxd4#
    • 1...Sa3
      • 2.Rd4#
    • 1...Sc3
      • 2.Rd4#
    • 1...Sd4
      • 2.Rxd4#
    • 1...Sa7
      • 2.Rd4#
    • 1...g4
      • 2.Sf4#
  • Tries
    • 1.Rxd6+?
      • 1...Bd4
        • 2.Rcxd4#
      • 1...Bxd6
        • 2.Rd4#
      • 1...Sd4
        • 2.Rcxd4#
      • 1...Sxd6
        • 2.Rd4#
      • 1...cxd6!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Se5#
      • 1...Kxc4
        • 2.Qc3#
      • 1...Qxe4
        • 2.Rc3#
      • 1...Sxc4
        • 2.Sxc5#
      • 1...Bd4
        • 2.Rxd4#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • Q(a);N_GUARD::S(B)
    • Q(a);N_GUARD::S(B),XQ(a)
    • B(h);N_GUARD::R1(C)
    • B(h);N_GUARD,N_SPINP(k)::R1(C),XB(h)
    • S(g);::B(E)+R(C),DCHECK
    • S(g);N_SPINP(k)::B(E)+R(C),DCHECK,XS(g)
    • P(i);N_GUARD::S(B)
  • Tries
    • Try
      • R(H);CHECK,XP(k)
      • Vars
        • B(h);N_GUARD,P_SPINB(h)::R1(C),XB(h)
        • B(h);N_GUARD,XR(H)::R1(C)
        • S(g);P_SPINS(g)::B(E)+R(C),DCHECK,XS(g)
        • S(g);XR(H)::B(E)+R(C),DCHECK
      • Refutation
        • P(l);XR(H)
  • Actual
    • S(F);N_PINP(k)
    • Threat
      • S(F)
    • Vars
      • K(d);P_SPINS(g),S_FLIGHT,XR(C)::QAR1(A)
      • Q(a);SBLOCK,XP(D)::R1(C)
      • S(f);SBLOCK,XR(C)::S(F),XB(h)
      • B(h);N_GUARD::R1(C),XB(h)
      • S(g);::B(E)+R(C),DCHECK,XS(g)
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