MESON Chess Problem Database
Problem Display
PID: 101019 (3Q4/r3p1bN/1p1Bk1P1/1R1n1p2/1p2n3/3p3N/5P1P/2q1RbK1 w - - 0 1)
Janet, Frank
Good Companions, 1920
#2
10 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.S3g5#
- 1...Qa3
- 2.S3g5#
- 1...Qg5+
- 2.S3xg5#
- 1...Qa1
- 2.S3g5#
- 1...Qb1
- 2.S3g5#
- 1...Qd1
- 2.S3g5#
- 1...Qc2
- 2.S3g5#
- 1...Qc3
- 2.S3g5#
- 1...Qc4
- 2.S3g5#
- 1...Qc5
- 2.S3g5#
- 1...Qc6
- 2.S3g5#
- 1...Qc7
- 2.S3g5#
- 1...Qc8
- 2.S3g5#
- 1...Bf6
- 2.Sf8#
- 1...Se3
- 2.Sf4#
- 1...Sf4
- 2.S3g5#
- 1...Sf6
- 2.Re5#
- 1...Sc7
- 2.Qxe7#
- 1...d2
- 2.S3g5#
- 1...Qb2
- Tries
- 1.Bf4?
- threat
- 2.S3g5#
- 2.Qxd5#
- 1...Qxf4
- 2.Qxd5#
- 1...Qxe1
- 2.Qxd5#
- 1...Bxh3
- 2.Qxd5#
- 1...Sxf4
- 2.S3g5#
- 1...Qe3
- 2.Qxd5#
- 1...Qc4
- 2.S3g5#
- 1...Qc5
- 2.S3g5#
- 1...Qc6
- 2.S3g5#
- 1...Rd7
- 2.S3g5#
- 2.Qg8#
- 1...Be2
- 2.Qxd5#
- 1...Be5
- 2.Qxd5#
- 1...Bf6
- 2.Sf8#
- 2.Qxd5#
- 1...Bh6
- 2.Qxd5#
- 1...Sc3
- 2.S3g5#
- 2.Rxb6#
- 1...Sf6
- 2.S3g5#
- 2.S7g5#
- 2.Re5#
- 1...Sc7
- 2.S3g5#
- 2.Qc8#
- 1...Se3!
- threat
- 1.Bc7?
- threat
- 2.Qxd5#
- 2.Qc8#
- 1...Qg5+
- 2.S3xg5#
- 1...Qxc7
- 2.Qxd5#
- 1...Rxc7
- 2.Qxd5#
- 1...Qc4
- 2.S3g5#
- 2.Qc8#
- 1...Qc5
- 2.S3g5#
- 2.Qc8#
- 1...Qc6
- 2.S3g5#
- 1...Ra8
- 2.Qxd5#
- 1...Sc3
- 2.Rxb6#
- 2.Qc8#
- 1...Se3
- 2.Sf4#
- 2.Qc8#
- 1...Sf4
- 2.S3g5#
- 2.Qc8#
- 1...Sf6
- 2.Re5#
- 1...Sxc7!
- threat
- 1.Bb8?
- threat
- 2.Qxd5#
- 1...Qg5+
- 2.S3xg5#
- 1...Qc4
- 2.S3g5#
- 1...Qc5
- 2.S3g5#
- 1...Qc6
- 2.S3g5#
- 1...Rd7
- 2.Qg8#
- 1...Sc3
- 2.Rxb6#
- 1...Se3
- 2.Sf4#
- 1...Sf4
- 2.S3g5#
- 1...Sf6
- 2.Re5#
- 1...Sc7!
- threat
- 1.Rxe4+?
- 1...Be5
- 2.Rxe5#
- 1...fxe4!
- 1...Be5
- 1.Bf4?
- Keys
- 1.Bg3!
- threat
- 2.Qxd5#
- 1...Qc4
- 2.S3g5#
- 1...Qc5
- 2.S3g5#
- 1...Qc6
- 2.S3g5#
- 1...Rd7
- 2.Qg8#
- 1...Sc3
- 2.Rxb6#
- 1...Se3
- 2.Sf4#
- 1...Sf4
- 2.S3g5#
- 1...Sf6
- 2.Re5#
- 1...Sc7
- 2.Qc8#
- threat
- 1.Bg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 12
- Sets
- Q(a);N_GUARD::S(E)
- Q(a);CHECK,N_GUARD::S(E),XQ(a)
- Q(a);N_GUARD,P_PINP(C)::S(E)
- B(l);N_GUARD,SBLOCK::S(I)
- S(f);N_GUARD,N_SPINS(e),S_CUTQ(a)::S(E)
- S(f);S_CUTQ(a)::S(E)
- S(f);OGATE::R1(F)
- S(f);N_GUARD,S_CUTR(j)::QAR1(J),XP(k)
- P(c);S_CUTQ(a)::S(E)
- Tries
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(a);XB(G)::QAB1(J),XS(f)
- Q(a);N_SPINS(e),XR(A)::QAB1(J),XS(f)
- B(b);P_PINR(A),XS(E)::QAB1(J),XS(f)
- S(f);XB(G)::S(E)
- Q(a);N_SPINS(e),P_PINP(C)::QAB1(J),XS(f)
- Q(a);::S(E)
- Q(a);P_PINP(C)::S(E)
- B(b);N_SPINS(e),P_PINR(A)::QAB1(J),XS(f)
- B(l);N_SPINS(e)::QAB1(J),XS(f)
- B(l);::QAB1(J),XS(f)
- Refutation
- S(f);N_SPINS(e)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD::S(E),XQ(a)
- Q(a);XB(G)::QAB1(J),XS(f)
- R(j);XB(G)::QAB1(J),XS(f)
- Q(a);N_GUARD::S(E)
- R(j);::QAB1(J),XS(f)
- S(f);OGATE::R1(F)
- Refutation
- S(f);XB(G)
- Try
- B(G);
- Threat
- QAB1(J),XS(f)
- Vars
- Q(a);CHECK,N_GUARD::S(E),XQ(a)
- Q(a);N_GUARD::S(E)
- Q(a);N_GUARD,P_PINP(C)::S(E)
- R(j);SBLOCK::QAB(J)
- S(f);N_GUARD,S_CUTQ(a)::R(F),XP(h)
- S(f);N_GUARD,N_SPINS(e),S_CUTQ(a)::S(E)
- S(f);S_CUTQ(a)::S(E)
- S(f);OGATE::R1(F)
- Refutation
- S(f);
- Try
- R(A);CHECK,XS(e)
- Vars
- B(l);N_GUARD,P_SPINB(l)::R1(A),XB(l)
- Refutation
- P(g);XR(A)
- Try
- Actual
- B(G);
- Threat
- QAB1(J),XS(f)
- Vars
- Q(a);N_GUARD::S(E)
- Q(a);N_GUARD,P_PINP(C)::S(E)
- R(j);SBLOCK::QAB(J)
- S(f);N_GUARD,S_CUTQ(a)::R(F),XP(h)
- S(f);N_GUARD,N_SPINS(e),S_CUTQ(a)::S(E)
- S(f);S_CUTQ(a)::S(E)
- S(f);OGATE::R1(F)
- S(f);S_CUTQ(a),S_CUTR(j)::QAB(J)
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).