MESON Chess Problem Database
Problem Display
PID: 163783 (1q1r2B1/3p3b/5p2/N1pN3R/1PPkp1Q1/4p2r/1P1bP2B/K4n2 w - - 0 1)
Keller, Michael
1st HM., Israel Ring Ty., 1989
#2
11 + 12
| 721 | Variantim | 1991 |
SOLUTION
- SOUND
- Sets
- 1...Bc3
- 2.bxc3#
- 1...Bc3
- Tries
- 1.Sc3?
- threat
- 2.Sb3#
- 2.Rd5#
- 1...Qxb4
- 2.Rd5#
- 1...Rxh5
- 2.Sb3#
- 1...Rxg8
- 2.Rd5#
- 1...Bxg8
- 2.Qxe4#
- 1...Qe5
- 2.Sb5#
- 2.Sb3#
- 1...Qd6
- 2.Sb5#
- 2.Sb3#
- 1...Qa7
- 2.Sb5#
- 2.Rd5#
- 1...Qb7
- 2.Sb3#
- 1...Qa8
- 2.Sb5#
- 1...Bf5
- 2.Sb3#
- 1...f5
- 2.Sb3#
- 1...d5!
- threat
- 1.Sb6?
- threat
- 2.Sb3#
- 2.Rd5#
- 1...Rxh5
- 2.Sb3#
- 1...Bxg8
- 2.Sb3#
- 1...Qe5
- 2.Sb3#
- 1...Qd6
- 2.Sb3#
- 1...Qa7
- 2.Rd5#
- 1...Qb7
- 2.Sb3#
- 1...Bf5
- 2.Sb3#
- 1...f5
- 2.Sb3#
- 1...d5
- 2.Sb3#
- 2.Sc6#
- 1...Qa8!
- threat
- 1.Sxf6?
- threat
- 2.Sb3#
- 2.Rd5#
- 1...Qxb4
- 2.Be5#
- 2.Rd5#
- 1...Rxh5
- 2.Sb3#
- 1...Rxg8
- 2.Rd5#
- 1...Bxg8
- 2.Qxe4#
- 1...Qe5
- 2.Sb3#
- 2.Bxe5#
- 1...Qd6
- 2.Sb3#
- 1...Qa7
- 2.Be5#
- 2.Rd5#
- 1...Qb7
- 2.Sb3#
- 2.Be5#
- 1...Qa8
- 2.Be5#
- 1...Bf5
- 2.Sb3#
- 1...d5!
- threat
- 1.Sc7?
- threat
- 2.Sb3#
- 2.Rd5#
- 1...Qxb4
- 2.Rd5#
- 1...Rxh5
- 2.Sb3#
- 1...Rxg8
- 2.Rd5#
- 2.Qxd7#
- 1...d5
- 2.Se6#
- 1...Qa7
- 2.Sb5#
- 2.Rd5#
- 1...Qb7
- 2.Sb3#
- 1...Qa8
- 2.Sb5#
- 1...Bf5
- 2.Sb3#
- 1...f5
- 2.Sb3#
- 2.Qg7#
- 1...Bxg8!
- threat
- 1.Se7?
- threat
- 2.Sb3#
- 2.Rd5#
- 1...Qxb4
- 2.Rd5#
- 1...Rxh5
- 2.Sb3#
- 1...Rxg8
- 2.Rd5#
- 1...Bxg8
- 2.Sf5#
- 1...d5
- 2.Sec6#
- 1...Qe5
- 2.Sb3#
- 1...Qd6
- 2.Sb3#
- 1...Qa7
- 2.Rd5#
- 1...Qb7
- 2.Sb3#
- 1...Bf5
- 2.Sb3#
- 2.Sxf5#
- 1...f5
- 2.Sb3#
- 1...Qa8!
- threat
- 1.Sc3?
- Keys
- 1.Sxe3!
- threat
- 2.Sc2#
- 1...Kxe3
- 2.Bg1#
- 1...Rxe3
- 2.Rd5#
- 1...Bxe3
- 2.Sb3#
- 2.Rd5#
- 1...Sxe3
- 2.Sb3#
- threat
- 1.Sxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 1
- Sets
- B(b);OGATE,P_PINP(B)::P(B),XB(b)
- Tries
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- Q(k);XP(E)::R1(J)
- R(d);XR(J)::S(H)
- R(l);XB(K)::R1(J)
- B(j);N_GUARD,XB(K)::QAR1(G),XP(f)
- Q(k);::S(H)
- Q(k);N_GUARD,P_PINS(H)::S(I)
- B(j);::S(H)
- P(h);::S(H)
- Refutation
- P(i);
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- R(d);XR(J)::S(H)
- B(j);XB(K)::S(H)
- Q(k);::S(H)
- Q(k);P_PINS(H)::R1(J)
- B(j);::S(H)
- P(h);::S(H)
- Refutation
- Q(k);P_PINS(H)
- Try
- S(I);XP(h)
- Threat
- DUALS(2)
- Vars
- R(d);XR(J)::S(H)
- R(l);XB(K)::R1(J)
- B(j);N_GUARD,XB(K)::QAR1(G),XP(f)
- Q(k);::S(H)
- Q(k);N_GUARD,P_PINS(H)::B(D)
- B(j);::S(H)
- Refutation
- P(i);
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- Q(k);XP(E)::R1(J)
- R(d);XR(J)::S(H)
- P(i);N_GUARD::S(I)
- Q(k);::S(H)
- Q(k);N_GUARD,P_PINS(H)::S(I)
- B(j);::S(H)
- Refutation
- B(j);XB(K)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- Q(k);XP(E)::R1(J)
- R(d);XR(J)::S(H)
- R(l);XB(K)::R1(J)
- B(j);N_GUARD,XB(K)::S(I)
- P(i);N_GUARD::S(I)
- Q(k);::S(H)
- Q(k);P_PINS(H)::R1(J)
- P(h);::S(H)
- Refutation
- Q(k);P_PINS(H)
- Try
- Actual
- S(I);XP(c)
- Threat
- S(I)
- Vars
- K(e);N_SPINP(f),OGATEB,S_FLIGHT,XS(I)::B(D)
- R(d);SBLOCK,XS(I)::R1(J)
- S(a);SBLOCK,XS(I)::S(H)
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).