MESON Chess Problem Database
Problem Display
PID: 22321 (7Q/3p4/N1npn3/3k4/3P4/1PR2b2/3R2p1/1B4K1 w - - 0 1)
Dombrovskis, Alfreds A
1st HM., Shakhmatny, 1978
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Sb4
- 2.Sxb4#
- 1...Scxd4
- 2.Sb4#
- 1...Sa5
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...Sa7
- 2.Sb4#
- 1...Se7
- 2.Sb4#
- 1...Sb8
- 2.Sb4#
- 1...Scd8
- 2.Sb4#
- 1...Sexd4
- 2.Sc7#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sed8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...Sb4
- Tries
- 1.Rc5+?
- 1...Sxc5
- 2.Sc7#
- 1...dxc5!
- 1...Sxc5
- 1.Qe5+?
- 1...Sxe5
- 2.Sb4#
- 1...dxe5!
- 1...Sxe5
- 1.Qh5+?
- 1...Se5
- 2.Sb4#
- 1...Sg5
- 2.Sc7#
- 1...Bxh5!
- 1...Se5
- 1.Qh7?
- 1...Scxd4
- 2.Qf5#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sed8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...Be2
- 2.Be4#
- 2.Qe4#
- 1...Bd1
- 2.Be4#
- 2.Qe4#
- 1...Be4
- 2.Bxe4#
- 2.Qxe4#
- 1...Bg4
- 2.Be4#
- 2.Qe4#
- 1...Bh5
- 2.Be4#
- 2.Qe4#
- 1...Sb4
- 2.Sxb4#
- 2.Qf5#
- 1...Sa5
- 2.Sb4#
- 2.Qf5#
- 1...Se5
- 2.Sb4#
- 1...Sa7
- 2.Sb4#
- 2.Qf5#
- 1...Se7
- 2.Sb4#
- 1...Sb8
- 2.Sb4#
- 2.Qf5#
- 1...Scd8
- 2.Sb4#
- 2.Qf5#
- 1...Sexd4!
- 1...Scxd4
- 1.Qa8?
- threat
- 2.Sb4#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sd8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...Sxd4!
- threat
- 1.Rc5+?
- Keys
- 1.Re3!
- 1...Scxd4
- 2.Qa8#
- 1...Sexd4
- 2.Qg8#
- 1...Sb4
- 2.Sxb4#
- 1...Sa5
- 2.Sb4#
- 1...Se5
- 2.Sb4#
- 1...Sa7
- 2.Sb4#
- 1...Se7
- 2.Sb4#
- 1...Sb8
- 2.Sb4#
- 1...Scd8
- 2.Sb4#
- 1...Be2
- 2.Be4#
- 1...Bd1
- 2.Be4#
- 1...Be4
- 2.Bxe4#
- 1...Bg4
- 2.Be4#
- 1...Bh5
- 2.Be4#
- 1...Sf4
- 2.Sc7#
- 1...Sc5
- 2.Sc7#
- 1...Sg5
- 2.Sc7#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sc7#
- 1...Sed8
- 2.Sc7#
- 1...Sf8
- 2.Sc7#
- 1...Scxd4
- 1.Re3!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD::S(G),XS(d)
- S(d);N_GUARD,P_SPINS(d),XP(F)::S(G)
- S(d);N_GUARD::S(G)
- S(f);N_GUARD,P_SPINS(f),XP(F)::S(G)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Tries
- Try
- R(E);CHECK
- Vars
- S(f);XR(E)::S(G)
- Refutation
- P(e);XR(E)
- Try
- Q(H);CHECK
- Vars
- S(d);XQ(H)::S(G)
- Refutation
- P(e);XQ(H)
- Try
- Q(H);CHECK
- Vars
- S(d);P_SPINS(d)::S(G)
- S(f);P_SPINS(f)::S(G)
- Refutation
- B(b);XQ(H)
- Try
- Q(H);
- Vars
- S(d);N_GUARD,P_SPINS(d),XP(F)::QAR2(H)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- S(d);N_GUARD::S(G)
- Refutation
- S(f);P_SPINS(f),XP(F)
- Try
- Q(H);P_PINS(d)
- Threat
- S(G)
- Vars
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
- Refutation
- S(f);N_SPINS(d),P_SPINS(f),XP(F)
- Try
- Actual
- R(E);
- Vars
- S(d);OGATEB,P_SPINS(d),XP(F)::QAB(H)
- S(f);OGATEB,P_SPINS(f),XP(F)::QAB(H)
- S(d);N_GUARD::S(G),XS(d)
- S(d);N_GUARD::S(G)
- B(b);N_GUARD::B(A)
- B(b);N_GUARD::B(A),XB(b)
- S(f);N_GUARD::S(G)
- S(f);N_GUARD::S(G),XS(f)
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