MESON Chess Problem Database
Problem Display
PID: 12175 (4r3/3bp1Bp/pQ5K/r1n2N2/2P2kPR/q2p4/5P1p/4N2B w - - 0 1)
Chandler, Guy Wills
The Problemist, 1975
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Be6
- 2.Qc7#
- 1...Sb3
- 2.Sxd3#
- 2.Qe3#
- 1...Sa4
- 2.Qe3#
- 2.Qd4#
- 1...Se4
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 1...Sb7
- 2.Qe3#
- 2.Qd4#
- 1...Be6
- Tries
- 1.Sxd3+?
- 1...Sxd3
- 2.Qe3#
- 2.Qd4#
- 1...Qxd3!
- 1...Sxd3
- 1.Sg3?
- threat
- 2.Sh5#
- 1...Sb3
- 2.Sxd3#
- 2.Qe3#
- 1...Sa4
- 2.Qe3#
- 2.Qd4#
- 1...Se4
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 2.g5#
- 1...Sb7
- 2.Qe3#
- 2.Qd4#
- 1...Bxg4!
- threat
- 1.Sxe7?
- threat
- 2.Sd5#
- 2.Qc7#
- 2.Qd6#
- 1...Bxg4
- 2.Qc7#
- 2.Qd6#
- 2.Qf6#
- 1...Qb2
- 2.Sd5#
- 1...Qa1
- 2.Sd5#
- 1...Qc3
- 2.Sd5#
- 1...Rc8
- 2.Sd5#
- 2.Qd6#
- 1...Bc6
- 2.Qc7#
- 2.g5#
- 1...Be6
- 2.Qc7#
- 2.Qd6#
- 1...Sb3
- 2.Sxd3#
- 2.Qe3#
- 1...Sa4
- 2.Qe3#
- 2.Qd4#
- 1...Se4
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 2.g5#
- 1...Sb7
- 2.Qe3#
- 2.Qd4#
- 1...Rxe7!
- threat
- 1.Qxc5?
- threat
- 2.Be5#
- 2.Qe3#
- 2.Qd4#
- 2.g5#
- 1...Qxc5
- 2.Sxd3#
- 1...Bxf5
- 2.Be5#
- 2.Qe3#
- 2.gxf5#
- 1...Qc1
- 2.Sxd3#
- 2.Be5#
- 2.Qd4#
- 2.g5#
- 1...Qb2
- 2.Sxd3#
- 2.Qe3#
- 2.g5#
- 1...Qa1
- 2.Sxd3#
- 2.Qe3#
- 2.g5#
- 1...Qc3
- 2.Qe3#
- 2.g5#
- 1...Bc6
- 2.Be5#
- 2.Qe3#
- 2.g5#
- 1...d2
- 2.Be5#
- 2.Qd4#
- 2.g5#
- 1...e5
- 2.Qe3#
- 1...Rxc5!
- threat
- 1.Qc6?
- threat
- 2.Sg2#
- 2.Qf3#
- 1...Se4
- 2.Qxe4#
- 1...d2
- 2.Sg2#
- 1...Bxc6!
- threat
- 1.Qf6?
- threat
- 2.Qe5#
- 2.Qg5#
- 2.g5#
- 1...Qb2
- 2.Qg5#
- 2.g5#
- 1...Qa1
- 2.Qg5#
- 2.g5#
- 1...Qc3
- 2.Qg5#
- 2.g5#
- 1...Sb3
- 2.Sxd3#
- 2.Qg5#
- 2.g5#
- 1...Sa4
- 2.Qd4#
- 2.Qg5#
- 2.g5#
- 1...Se4
- 2.g5#
- 1...Se6
- 2.g5#
- 1...Sb7
- 2.Qd4#
- 2.Qg5#
- 2.g5#
- 1...e5
- 2.Qg5#
- 2.g5#
- 1...exf6!
- threat
- 1.Qg6?
- threat
- 2.Qg5#
- 2.g5#
- 1...Bxf5
- 2.Qxf5#
- 2.Qg5#
- 2.gxf5#
- 1...Se4
- 2.g5#
- 1...Se6
- 2.g5#
- 1...hxg6!
- threat
- 1.Sxd3+?
- Keys
- 1.Se3!
- threat
- 2.Sd5#
- 1...Bxg4
- 2.Rxg4#
- 1...Bc6
- 2.g5#
- 1...Be6
- 2.Qc7#
- 1...Sb3
- 2.Sxd3#
- 1...Sa4
- 2.Qd4#
- 1...Se4
- 2.S3g2#
- 1...Se6
- 2.g5#
- 1...Sb7
- 2.Qd4#
- 1...e6
- 2.g5#
- threat
- 1.Se3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 6
- REMOVED MATES = 0
- Sets
- B(h);S_CUTP(i)::QAB(H)
- S(f);OGATE::QAB1(H)
- Tries
- Try
- S(A);CHECK,XP(c)
- Refutation
- Q(b);XS(A)
- Try
- S(G);
- Threat
- S(G)
- Vars
- S(f);OGATE::QAB1(H)
- Refutation
- B(h);P_SPINB(h),XP(E)
- Try
- S(G);XP(i)
- Threat
- DUALS(3)
- Vars
- Q(b);::S(G)
- S(f);OGATE::QAB1(H)
- Refutation
- R(k);XS(G)
- Try
- Q(H);XS(f)
- Threat
- DUALS(4)
- Vars
- Q(b);N_GUARD,XQ(H)::S(A),XP(c)
- P(i);::QAB1(H)
- Refutation
- R(e);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- S(f);N_GUARD::QAR1(H),XS(f)
- P(c);::S(A)
- Refutation
- B(h);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(3)
- Vars
- S(f);::R(F)+P(E)
- Refutation
- P(i);XQ(H)
- Try
- Q(H);
- Threat
- DUALS(2)
- Vars
- S(f);::R(F)+P(E)
- Refutation
- P(j);XQ(H)
- Try
- Actual
- S(G);
- Threat
- S(G)
- Vars
- B(h);OGATE,P_SPINB(h),XP(E)::R1(F),XB(h)
- B(h);N_GUARD::R(F)+P(E)
- B(h);S_CUTP(i)::QAB(H)
- S(f);N_GUARD,S_CUTQ(b)::S(A),XP(c)
- S(f);OGATE::QAR2(H)
- S(f);SBLOCK::S(G)
- S(f);S_CUTB(h)::R(F)+P(E)
- P(i);S_CUTB(h)::R(F)+P(E)
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).