MESON Chess Problem Database

Problem Display
PID: 181126 (4Q2K/1p6/bp6/q2P4/r1k5/pN1R4/P1NrBB2/8 w - - 0 1)

Gavrilov, Constantin Grigorievich

2nd Prize, Tidskrift for Schack, 1904

4Q2K/1p6/bp6/q2P4/r1k5/pN1R4/P1NrBB2/8

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3+
      • 2.Rd4#
    • 1...Qb4
      • 2.Se3#
    • 1...Qb5
      • 2.Sxd2#
      • 2.Qe4#
    • 1...Qc5
      • 2.Sxd2#
    • 1...Qxd5
      • 2.Sxd2#
      • 2.Qxa4#
    • 1...Rb4
      • 2.Se3#
      • 2.Sxd2#
    • 1...Bb5
      • 2.Qe4#
    • 1...b5
      • 2.Qe4#
  • Tries
    • 1.Sxa5+?
      • 1...bxa5
        • 2.Qxa4#
      • 1...Rxa5!
    • 1.Qxa4+?
      • 1...Qb4
        • 2.Sxa3#
        • 2.Se3#
        • 2.Sxd2#
        • 2.Qxb4#
      • 1...Qxa4!
    • 1.Qc6+?
      • 1...Qc5
        • 2.Sxd2#
      • 1...bxc6!
  • Keys
    • 1.Be1!
      • 1...Qc3+
        • 2.Rd4#
      • 1...Qxd5
        • 2.Qxa4#
      • 1...Rxc2
        • 2.Rd4#
      • 1...Rxe2
        • 2.Rd4#
      • 1...Rxd3
        • 2.Se3#
      • 1...Qb4
        • 2.Se3#
      • 1...Qb5
        • 2.Qe4#
      • 1...Qc5
        • 2.Sxd2#
      • 1...Rd1
        • 2.Se3#
        • 2.Rxd1#
        • 2.Rd4#
      • 1...Rb4
        • 2.Se3#
      • 1...Bb5
        • 2.Qe4#
      • 1...b5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • Q(e);CHECK,SBLOCK::B(C)+R(F),DCHECK
    • Q(e);SBLOCK::S(B)
    • Q(e);N_GUARD::S(E),XR(a)
    • B(f);SBLOCK::QAR2(H)
    • P(g);SBLOCK::QAR2(H)
  • Tries
    • Try
      • S(E);CHECK,XQ(e)
      • Vars
        • P(g);XS(E)::QAR2(H),XR(c)
      • Refutation
        • R(c);XS(E)
    • Try
      • Q(H);CHECK,XR(c)
      • Refutation
        • Q(e);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • Q(e);P_SPINQ(e)::S(E),XR(a)
      • Refutation
        • P(h);XQ(H)
  • Actual
    • B(D);
    • Vars
      • Q(e);CHECK,SBLOCK::B(C)+R(F),DCHECK
      • Q(e);N_GUARD,XP(G)::QAR2(H),XR(c)
      • R(a);XS(B)::B(C)+R(F),DCHECK
      • R(a);XB(C)::R1(F)
      • R(a);P_SPINR(a),XR(F)::S(B)
      • Q(e);SBLOCK::S(B)
      • Q(e);SBLOCK::QAR2(H)
      • Q(e);N_GUARD,SBLOCK::S(E),XR(a)
      • R(c);SBLOCK::S(B)
      • B(f);SBLOCK::QAR2(H)
      • P(g);SBLOCK::QAR2(H)
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