MESON Chess Problem Database
Problem Display
PID: 198952 (1BKN4/1B2N3/1p2Qr2/2k4r/P1p5/2P5/4b2b/6q1 w - - 0 1)
Ahues, Herbert Siegfried Oskar
3rd Prize, Suomen Shakki, 1987
#2
8 + 8
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Qxe3#
- 1...Qa1
- 2.Qe3#
- 1...Qb1
- 2.Qe3#
- 1...Qe1
- 2.Qe3#
- 1...Qf1
- 2.Qe3#
- 1...Qh1
- 2.Qe3#
- 1...Qg2
- 2.Qe3#
- 1...Qg6
- 2.Qe3#
- 1...Qg7
- 2.Qe3#
- 1...Qg8
- 2.Qe3#
- 1...Rh3
- 2.Qd5#
- 1...Rh4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.Bd6#
- 1...Rhh6
- 2.Qd5#
- 1...Rh7
- 2.Qd5#
- 1...Rh8
- 2.Qd5#
- 1...Rf1
- 2.Qc6#
- 1...Rf2
- 2.Qe3#
- 2.Qc6#
- 1...Rf3
- 2.Qc6#
- 1...Rf4
- 2.Bd6#
- 2.Qc6#
- 2.Qd6#
- 1...Rf5
- 2.Qc6#
- 1...Rxe6
- 2.Sxe6#
- 1...Rf7
- 2.Qc6#
- 1...Rf8
- 2.Qc6#
- 1...Be5
- 2.Qd5#
- 1...Bd6
- 2.Bxd6#
- 1...b5
- 2.Ba7#
- 1...Qe3
- Tries
- 1.Bh1?
- threat
- 2.Sb7#
- 1...Qxh1
- 2.Qe3#
- 1...Qg2
- 2.Qe3#
- 1...Qg8
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Bf3!
- threat
- 1.Bg2?
- threat
- 2.Sb7#
- 1...Qxg2
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Bf3!
- threat
- 1.Bf3?
- threat
- 2.Sb7#
- 1...Qg8
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Bxf3!
- threat
- 1.Be4?
- threat
- 2.Sb7#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Qg8!
- threat
- 1.Bd5?
- threat
- 2.Sb7#
- 1...Qg8
- 2.Qe3#
- 1...Rf8
- 2.Qc6#
- 1...Rh8!
- threat
- 1.Bc6?
- threat
- 2.Sb7#
- 1...b5
- 2.Ba7#
- 1...Qg8
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8!
- threat
- 1.Ba8?
- threat
- 2.Sb7#
- 1...Qh1
- 2.Qe3#
- 1...Qg2
- 2.Qe3#
- 1...Qg8
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Bf3!
- threat
- 1.Bc7?
- threat
- 2.Bxb6#
- 1...Rxe6
- 2.Sxe6#
- 1...Qb1
- 2.Qe3#
- 1...Bd6
- 2.Bxd6#
- 1...b5
- 2.Bb6#
- 1...Bxc7!
- threat
- 1.Bh1?
- Keys
- 1.Ba6!
- threat
- 2.Sb7#
- 1...Qh1
- 2.Qe3#
- 1...Qg2
- 2.Qe3#
- 1...Qg8
- 2.Qe3#
- 1...Rh8
- 2.Qd5#
- 1...Rf8
- 2.Qc6#
- 1...Bf3
- 2.Qxc4#
- threat
- 1.Ba6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 21
- Sets
- Q(a);N_GUARD::QAB(C),XQ(a)
- Q(a);N_GUARD::QAB(C)
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD::QAR1(C)
- R(f);N_GUARD::QAR1(C),XR(f)
- R(f);S_CUTB(c)::B(F)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD::QAR1(C)
- R(h);XQ(C)::S(H),XR(h)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- B(c);S_CUTR(f)::QAR1(C)
- B(c);N_GUARD::B(F),XB(c)
- P(g);OGATEB::B(F)
- Tries
- Try
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD,XB(D)::QAB(C)
- Q(a);N_GUARD::QAB(C)
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- B(b);
- Try
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD,XB(D)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- B(b);
- Try
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- B(b);XB(D)
- Try
- B(D);
- Threat
- S(H)
- Vars
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- Q(a);P_PINS(H)
- Try
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- R(f);P_PINS(H)
- Try
- B(D);
- Threat
- S(H)
- Vars
- P(g);OGATEB::B(F)
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- R(h);P_PINS(H)
- Try
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD::QAB(C)
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- Refutation
- B(b);
- Try
- B(F);
- Threat
- B(F),XP(g)
- Vars
- R(h);XQ(C)::S(H),XR(h)
- Q(a);N_GUARD::QAB(C)
- B(c);N_GUARD::B(F),XB(c)
- P(g);::B(F)
- Refutation
- B(c);XB(F)
- Try
- Actual
- B(D);
- Threat
- S(H)
- Vars
- Q(a);N_GUARD::QAB(C)
- Q(a);N_GUARD,P_PINS(H)::QAB(C)
- R(f);N_GUARD,P_PINS(H)::QAR1(C)
- R(h);N_GUARD,P_PINS(H)::QAR1(C)
- B(b);N_GUARD::QAR1(C),XP(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).