MESON Chess Problem Database
Problem Display
PID: 278618 (BKN2R2/6np/3R2bN/4k2p/6P1/2b5/2Q1P3/1n6 w - - 0 1)
Brask, Seppo
Stella Polaris, 1973
#2
9 + 7
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Qc5#
- 1...Be1
- 2.Qc5#
- 1...Bb2
- 2.Qc5#
- 1...Bd2
- 2.Qc5#
- 1...Ba5
- 2.Qc5#
- 1...Be4
- 2.Qxe4#
- 1...Bf7
- 2.Qe4#
- 1...Be8
- 2.Qe4#
- 1...Sd2
- 2.Qxc3#
- 1...Sa3
- 2.Qxc3#
- 1...Sf5
- 2.Qe4#
- 1...Se6
- 2.Rd5#
- 1...hxg4
- 2.Sxg4#
- 1...Ba1
- Tries
- 1.Sf7+?
- 1...Bxf7
- 2.Qe4#
- 1...Kf4!
- 1...Bxf7
- 1.Rxg6?
- threat
- 2.Qe4#
- 1...Sd2
- 2.Qxc3#
- 1...Kd4!
- threat
- 1.Rf5+?
- 1...Sxf5
- 2.Qe4#
- 1...Bxf5!
- 1...Sxf5
- 1.Qd3?
- threat
- 2.Qb5#
- 2.Qg3#
- 2.Qd5#
- 1...Bf5
- 2.Qg3#
- 1...Bf7
- 2.Qe4#
- 2.Qe3#
- 2.Qg3#
- 1...Sf5
- 2.Qe4#
- 1...Bb4
- 2.Qg3#
- 2.Qd4#
- 2.Qd5#
- 1...Be1
- 2.Qb5#
- 2.Qd4#
- 2.Qd5#
- 1...Bd2
- 2.Qb5#
- 2.Qd4#
- 2.Qd5#
- 1...Bd4
- 2.Qg3#
- 2.Qxd4#
- 1...Be4
- 2.Qxe4#
- 2.Qg3#
- 1...Be8
- 2.Qe4#
- 2.Qe3#
- 2.Qg3#
- 2.Qd5#
- 1...Sa3
- 2.Qxc3#
- 2.Qg3#
- 2.Qd5#
- 1...Se6
- 2.Rd5#
- 2.Qd5#
- 1...h4
- 2.Qb5#
- 2.Qd5#
- 1...Bxd3!
- threat
- 1.Qa4?
- threat
- 2.Qb5#
- 2.Qf4#
- 1...Bd2
- 2.Qb5#
- 2.Qd4#
- 1...Bd4
- 2.Qxd4#
- 1...Bd3
- 2.Sf7#
- 2.Qf4#
- 1...Be4
- 2.Qxe4#
- 1...Bf5
- 2.Sf7#
- 1...Bf7
- 2.Sxf7#
- 2.Qe4#
- 1...Be8
- 2.Qe4#
- 2.Qf4#
- 1...Sa3
- 2.Qf4#
- 1...Sf5
- 2.Qe4#
- 1...Se6
- 2.Rd5#
- 1...Bb4!
- threat
- 1.Qxg6?
- threat
- 2.Rd5#
- 2.Qe4#
- 2.Qf6#
- 2.Qxg7#
- 1...Sf5
- 2.Rxf5#
- 2.Qxf5#
- 1...Sd2
- 2.Rd5#
- 2.Qf6#
- 2.Qxg7#
- 1...Se6
- 2.Rd5#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qxe6#
- 2.Qf6#
- 1...Se8
- 2.Rd5#
- 2.Rf5#
- 2.Qe4#
- 2.Qf5#
- 2.Qxh5#
- 2.Qxe8#
- 2.Qg5#
- 2.Qe6#
- 1...hxg6!
- threat
- 1.e4?
- threat
- 2.Qh2#
- 1...hxg4
- 2.Sxg4#
- 1...Be1
- 2.Qc5#
- 1...Bd2
- 2.Qc5#
- 1...Sd2
- 2.Qxc3#
- 1...Se6
- 2.Rd5#
- 1...Sf5!
- threat
- 1.gxh5?
- threat
- 2.Sg4#
- 1...Bxh5
- 2.Qe4#
- 1...Bf7
- 2.Qe4#
- 1...Sf5
- 2.Qe4#
- 1...Bf5!
- threat
- 1.Sf7+?
- Keys
- 1.e3!
- threat
- 2.Qh2#
- 1...Bxc2
- 2.Sf7#
- 1...hxg4
- 2.Sxg4#
- 1...Be1
- 2.Qc5#
- 1...Bd2
- 2.Qc5#
- 1...Sd2
- 2.Qxc3#
- 1...Sf5
- 2.Qe4#
- 1...Se6
- 2.Rd5#
- threat
- 1.e3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 7
- Sets
- B(b);OGATE::QAR2(A)
- B(e);N_GUARD::QAR1(A),XB(e)
- B(e);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAB(A),XB(b)
- S(f);S_CUTB(e)::QAR1(A)
- S(f);SBLOCK::R1(D)
- P(d);XP(C)::S(E),XP(d)
- Tries
- Try
- S(E);CHECK
- Vars
- B(e);XS(E)::QAR1(A)
- Refutation
- K(c);S_FLIGHT
- Try
- R(D);XB(e)
- Threat
- QAR1(A)
- Vars
- S(a);N_GUARD::QAB(A),XB(b)
- Refutation
- K(c);S_FLIGHT
- Try
- R(I);CHECK
- Vars
- S(f);XR(I)::QAR1(A)
- Refutation
- B(e);XR(I)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- B(e);::QAB(A)
- S(f);S_CUTB(e)::QAR1(A)
- Refutation
- B(e);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- B(b);N_GUARD::QAB1(A),XB(b)
- B(e);N_GUARD::QAR1(A),XB(e)
- B(e);N_GUARD::S(E)
- S(a);::QAB1(A)
- S(f);S_CUTB(e)::QAR1(A)
- S(f);SBLOCK::R1(D)
- Refutation
- B(b);
- Try
- Q(A);XB(e)
- Threat
- DUALS(4)
- Refutation
- P(g);XQ(A)
- Try
- P(B);
- Threat
- QAB(A)
- Vars
- P(d);XP(C)::S(E),XP(d)
- B(b);OGATE::QAR2(A)
- S(a);N_GUARD::QAB(A),XB(b)
- S(f);SBLOCK::R1(D)
- Refutation
- S(f);
- Try
- P(C);XP(d)
- Threat
- S(E)
- Vars
- B(e);N_GUARD,XP(C)::QAR1(A)
- B(e);N_GUARD::QAR1(A)
- S(f);S_CUTB(e)::QAR1(A)
- Refutation
- B(e);
- Try
- Actual
- P(B);
- Threat
- QAB(A)
- Vars
- B(e);N_GUARD,XQ(A)::S(E)
- P(d);XP(C)::S(E),XP(d)
- B(b);OGATE::QAR2(A)
- S(a);N_GUARD::QAB(A),XB(b)
- S(f);S_CUTB(e)::QAR1(A)
- S(f);SBLOCK::R1(D)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).