MESON Chess Problem Database

Problem Display
PID: 90023 (BnN5/8/2r2P2/r3ppK1/p3k2p/b2R2n1/2PPp3/1QN5 w - - 0 1)

Popovski, Aleksandr

Die Schwalbe, 1997

BnN5/8/2r2P2/r3ppK1/p3k2p/b2R2n1/2PPp3/1QN5

#2

9 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Sd6#
    • 1...Bxc1
      • 2.Sd6#
      • 2.Qb4#
    • 1...Bb2
      • 2.Sd6#
    • 1...Bb4
      • 2.Qxb4#
    • 1...Bd6
      • 2.Sxd6#
  • Tries
    • 1.Sxe2?
      • threat
        • 2.Sc3#
      • 1...Sxe2
        • 2.Qh1#
      • 1...Rc5
        • 2.Sd6#
      • 1...Rd5
        • 2.Re3#
      • 1...Bb2
        • 2.Sd6#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Rxa8!
    • 1.Bxc6+?
      • 1...Rd5
        • 2.Bxd5#
      • 1...Sxc6!
    • 1.Qb3?
      • threat
        • 2.Qc4#
      • 1...Rxa8
        • 2.Qd5#
      • 1...Rc5
        • 2.Sd6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bb2
        • 2.Sd6#
      • 1...Bc5
        • 2.Qd5#
      • 1...axb3!
  • Keys
    • 1.Qa2!
      • threat
        • 2.Qc4#
      • 1...Rxa8
        • 2.Qd5#
      • 1...Rc5
        • 2.Sd6#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Bb2
        • 2.Sd6#
      • 1...Bc5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(g);S_CUTB(b)::S(I)
    • B(b);N_GUARD::S(I)
    • B(b);N_GUARD::QAR(A),XB(b)
    • B(b);N_GUARD::S(I),XB(b)
  • Tries
    • Try
      • S(B);XP(a)
      • Threat
        • S(B)
      • Vars
        • S(c);N_GUARD,XS(B)::QAB(A)
        • R(g);S_CUTB(b)::S(I)
        • R(g);N_SPINR(j),SBLOCK::R1(E)
        • B(b);N_GUARD::S(I)
        • B(b);N_GUARD::QAR(A),XB(b)
      • Refutation
        • R(g);N_SPINR(j),XB(H)
    • Try
      • B(H);CHECK,XR(j)
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::B(H),XR(g)
      • Refutation
        • S(k);XB(H)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • R(g);N_GUARD,N_SPINR(j),XB(H)::QAB1(A)
        • R(g);S_CUTB(b)::S(I)
        • R(g);N_GUARD,N_SPINR(j)::QAB1(A),XR(g)
        • B(b);N_GUARD::S(I)
        • B(b);S_CUTR(g)::QAB1(A)
      • Refutation
        • P(d);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • R(g);N_GUARD,N_SPINR(j),XB(H)::QAB1(A)
      • R(g);S_CUTB(b)::S(I)
      • R(g);N_GUARD,N_SPINR(j)::QAB1(A),XR(g)
      • B(b);N_GUARD::S(I)
      • B(b);S_CUTR(g)::QAB1(A)
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