MESON Chess Problem Database
Problem Display
PID: 100902 (5Q2/1K6/BRp2NN1/p1P5/3kbb1R/2q5/5P2/B7 w - - 0 1)
Dobbs, Gilbert S
Good Companions, 1920
#2
10 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb2
- 2.Bxb2#
- 1...Bb1
- 2.Qd6#
- 1...Bc2
- 2.Qd6#
- 1...Bd3
- 2.Qd6#
- 1...Bf5
- 2.Qd6#
- 1...Bxg6
- 2.Qd6#
- 1...Bc1
- 2.Rxe4#
- 2.Qd6#
- 1...Bd2
- 2.Rxe4#
- 2.Qd6#
- 1...Bh2
- 2.Rxe4#
- 1...Be3
- 2.Rxe4#
- 2.Qd6#
- 1...Bg3
- 2.Rxe4#
- 1...Be5
- 2.Rxe4#
- 1...Bg5
- 2.Rxe4#
- 2.Qd6#
- 1...Bd6
- 2.Qxd6#
- 1...Bh6
- 2.Rxe4#
- 2.Qd6#
- 1...Bc7
- 2.Rxe4#
- 1...Bb8
- 2.Rxe4#
- 1...a4
- 2.Rb4#
- 1...Qb2
- Tries
- 1.Rxf4?
- threat
- 2.Rxe4#
- 2.Qd6#
- 1...Qb2
- 2.Bxb2#
- 1...Qxa1!
- threat
- 1.Rb3?
- threat
- 2.Bxc3#
- 1...Bd6
- 2.Qxd6#
- 1...Qb2
- 2.Bxb2#
- 1...Bd2
- 2.Rxe4#
- 2.Qd6#
- 1...Qxa1!
- threat
- 1.Qd6+?
- 1...Bd5
- 2.Rxf4#
- 1...Bxd6!
- 1...Bd5
- 1.Qe7?
- 1...Bxg6
- 2.Qd6#
- 2.Qe3#
- 1...Qb2
- 2.Bxb2#
- 1...Bd6
- 2.Qxd6#
- 1...Bh1
- 2.Qe3#
- 2.Qe5#
- 1...Bb1
- 2.Qd6#
- 2.Qe3#
- 2.Qe5#
- 1...Bc2
- 2.Qd6#
- 2.Qe3#
- 2.Qe5#
- 1...Bg2
- 2.Qe3#
- 2.Qe5#
- 1...Bd3
- 2.Qd6#
- 2.Qe3#
- 2.Qe5#
- 1...Bf3
- 2.Qe3#
- 2.Qe5#
- 1...Bd5
- 2.Qe3#
- 1...Bf5
- 2.Qd6#
- 2.Qe3#
- 2.Qe5#
- 1...Bc1
- 2.Rxe4#
- 2.Qd6#
- 2.Qe5#
- 1...Bd2
- 2.Rxe4#
- 2.Qd6#
- 2.Qe5#
- 1...Bh2
- 2.Rxe4#
- 1...Be3
- 2.Rxe4#
- 2.Qd6#
- 2.Qe5#
- 1...Bg3
- 2.Rxe4#
- 1...Be5
- 2.Rxe4#
- 2.Qxe5#
- 1...Bg5
- 2.Rxe4#
- 2.Qd6#
- 2.Qe5#
- 1...Bh6
- 2.Rxe4#
- 2.Qd6#
- 2.Qe5#
- 1...Bc7
- 2.Rxe4#
- 1...Bb8
- 2.Rxe4#
- 1...a4
- 2.Rb4#
- 1...Qxa1!
- 1...Bxg6
- 1.Qd8+?
- 1...Kxc5
- 2.Sxe4#
- 1...Bd6
- 2.Qxd6#
- 1...Bd5!
- 1...Kxc5
- 1.Rxf4?
- Keys
- 1.Rb2!
- 1...Qxb2+
- 2.Bxb2#
- 1...Qb4+
- 2.Rxb4#
- 1...Qb3+
- 2.Rxb3#
- 1...Qxc5
- 2.Rd2#
- 2.Rb4#
- 1...Bxg6
- 2.Qd6#
- 1...Qe1
- 2.Rd2#
- 2.Rb4#
- 1...Qd2
- 2.Rxd2#
- 2.Rb4#
- 1...Qc1
- 2.Rd2#
- 2.Rb4#
- 1...Qc2
- 2.Rxc2#
- 2.Rb4#
- 1...Qa3
- 2.Rd2#
- 2.Rb4#
- 1...Qd3
- 2.Rd2#
- 2.Rb4#
- 1...Qe3
- 2.Rd2#
- 2.Rb4#
- 1...Qf3
- 2.Rd2#
- 2.Rb4#
- 1...Qg3
- 2.Rd2#
- 2.Rb4#
- 1...Qh3
- 2.Rd2#
- 2.Rb4#
- 1...Qc4
- 2.Rd2#
- 1...Bd6
- 2.Qxd6#
- 1...Bh1
- 2.Rd2#
- 1...Bb1
- 2.Qd6#
- 1...Bc2
- 2.Qd6#
- 1...Bg2
- 2.Rd2#
- 1...Bd3
- 2.Qd6#
- 1...Bf3
- 2.Rd2#
- 1...Bd5
- 2.Rd2#
- 1...Bf5
- 2.Qd6#
- 1...Bc1
- 2.Rxe4#
- 2.Qd6#
- 1...Bd2
- 2.Rxd2#
- 2.Rxe4#
- 2.Qd6#
- 1...Bh2
- 2.Rd2#
- 2.Rxe4#
- 1...Be3
- 2.Rxe4#
- 2.Qd6#
- 1...Bg3
- 2.Rd2#
- 2.Rxe4#
- 1...Be5
- 2.Rd2#
- 2.Rxe4#
- 1...Bg5
- 2.Rxe4#
- 2.Qd6#
- 1...Bh6
- 2.Rxe4#
- 2.Qd6#
- 1...Bc7
- 2.Rd2#
- 2.Rxe4#
- 1...Bb8
- 2.Rd2#
- 2.Rxe4#
- 1...a4
- 2.Rb4#
- 1...Qxb2+
- 1.Rb2!
This is a version of 64402
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 5
- Sets
- Q(a);OGATEB,P_PINR(F)::B(A),XQ(a)
- B(c);N_GUARD,P_SPINB(d)::QAR2(J)
- B(c);N_GUARD,P_SPINB(d),XS(H)::QAR2(J)
- B(d);OGATE,P_SPINB(c)::R1(C),XB(c)
- B(d);N_GUARD,P_SPINB(c)::QAR2(J),XB(d)
- P(e);N_GUARD::R(F)
- Tries
- Try
- R(C);P_PINB(c),XB(d)
- Threat
- DUALS(2)
- Vars
- Q(a);OGATEB,P_PINR(F)::B(A),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- R(F);
- Threat
- B(A),XQ(a)
- Vars
- B(d);N_GUARD,P_SPINB(c)::QAR2(J),XB(d)
- Q(a);OGATEB,P_PINR(F)::B(A),XQ(a)
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- Q(J);CHECK
- Vars
- B(c);P_SPINB(d)::R(C),XB(d)
- Refutation
- B(d);P_SPINB(c),XQ(J)
- Try
- Q(J);
- Vars
- Q(a);OGATEB,P_PINR(F)::B(A),XQ(a)
- B(d);N_GUARD,P_SPINB(c)::QAR2(J),XB(d)
- B(c);OGATE,P_SPINB(d)::QAB1(J)
- B(d);OGATE,P_SPINB(c)::R1(C),XB(c)
- P(e);N_GUARD::R(F)
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- Q(J);CHECK
- Vars
- K(b);N_SPINQ(a),S_FLIGHT,XP(D)::S(G),XB(c)
- B(d);N_GUARD,P_SPINB(c)::QAR2(J),XB(d)
- Refutation
- B(c);P_SPINB(d)
- Try
- Actual
- R(F);N_PINQ(a)
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(F)::B(A),XQ(a)
- Q(a);CHECK::B(A)+R(F),DCHECK,XQ(a)
- Q(a);CHECK,OGATEB::B(A)+R(F),XQ(a)
- B(c);N_GUARD,P_SPINB(d),XS(H)::QAR2(J)
- Q(a);::B(A)+R(F),DCHECK
- B(d);N_GUARD,P_SPINB(c)::QAR2(J),XB(d)
- B(c);N_GUARD,P_SPINB(d)::R(F)
- B(c);N_GUARD,P_SPINB(d)::QAR2(J)
- P(e);N_GUARD::R(F)
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).