MESON Chess Problem Database
Problem Display
PID: 2914 (1Q1N3n/5pq1/2K3p1/2Pp2B1/3k2r1/N4R2/1p4pR/1B1n3b w - - 0 1)
Blake, Percy Francis
Source?, 1909
#2
9 + 11
| 2681 | All Change Here! | 1919 |
SOLUTION
- SOUND
- Sets
- 1...Qe5
- 2.Qb4#
- 1...Qf6+
- 2.Bxf6#
- 1...Qh6
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qh7
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Rg3
- 2.Qf4#
- 1...Re4
- 2.Rd3#
- 1...Rf4
- 2.Qxf4#
- 1...Rh4
- 2.Rxh4#
- 1...Rxg5
- 2.Qf4#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Be3#
- 1...Se3
- 2.Qxb2#
- 1...g1Q
- 2.Rd2#
- 1...g1S
- 2.Rd2#
- 1...g1B
- 2.Rd2#
- 1...g1R
- 2.Rd2#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Qe5
- Tries
- 1.Kb6?
- threat
- 2.Sc6#
- 1...Qf6+
- 2.Bxf6#
- 1...Se3!
- threat
- 1.Sc2+?
- 1...Kc4
- 2.Ba2#
- 2.Qb3#
- 2.Qb4#
- 2.Qb5#
- 1...Ke4!
- 1...Kc4
- 1.Be3+?
- 1...Sxe3
- 2.Qxb2#
- 1...Kc3!
- 1...Sxe3
- 1.Bf4?
- threat
- 2.Qb4#
- 1...Rxf4
- 2.Qxf4#
- 1...Se3
- 2.Qxb2#
- 1...Qf6+!
- threat
- 1.Bh4?
- 1...Qf6+
- 2.Bxf6#
- 1...Rxh4
- 2.Rxh4#
- 1...Se3
- 2.Qxb2#
- 1...g1Q
- 2.Rd2#
- 1...g1S
- 2.Rd2#
- 1...g1B
- 2.Rd2#
- 1...g1R
- 2.Rd2#
- 1...Qe5
- 2.Qb4#
- 1...Qh6
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qh7
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Rg3
- 2.Qf4#
- 1...Re4
- 2.Rd3#
- 1...Rf4
- 2.Qxf4#
- 1...Rg5
- 2.Qf4#
- 1...Sf2
- 2.Bxf2#
- 2.Qxb2#
- 1...Sc3
- 2.Bf2#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...g5!
- 1...Qf6+
- 1.Rxg2?
- threat
- 2.Rd2#
- 2.Rxg4#
- 1...Qf6+
- 2.Bxf6#
- 1...Rxg2
- 2.Qf4#
- 1...Rxg5
- 2.Rd2#
- 2.Qf4#
- 1...Se3
- 2.Qxb2#
- 1...Qe5
- 2.Rd2#
- 2.Qb4#
- 1...Rg3
- 2.Rd2#
- 2.Qf4#
- 1...Re4
- 2.Rd2#
- 2.Rd3#
- 1...Rf4
- 2.Rd2#
- 2.Qxf4#
- 1...Rh4
- 2.Rd2#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Be3#
- 2.Rd2#
- 1...f5
- 2.Se6#
- 2.Rd2#
- 1...Bxg2!
- threat
- 1.Re3?
- threat
- 2.Qb4#
- 1...Rxg5
- 2.Qf4#
- 1...Sxe3
- 2.Qxb2#
- 1...Rf4
- 2.Qxf4#
- 1...Re4
- 2.Rd3#
- 1...Qf6+!
- threat
- 1.Rg3?
- 1...Qf6+
- 2.Bxf6#
- 1...Rxg5
- 2.Qf4#
- 1...Se3
- 2.Qxb2#
- 1...g1Q
- 2.Rd2#
- 1...g1S
- 2.Rd2#
- 1...g1B
- 2.Rd2#
- 1...g1R
- 2.Rd2#
- 1...Qe5
- 2.Qb4#
- 1...Qh6
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qh7
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Re4
- 2.Rd3#
- 1...Rf4
- 2.Qxf4#
- 1...Rh4
- 2.Rxh4#
- 1...Sf2
- 2.Qxb2#
- 1...Sc3
- 2.Be3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Rxg3!
- 1...Qf6+
- 1.Qxb2+?
- 1...Sc3
- 2.Qxc3#
- 1...Sxb2!
- 1...Sc3
- 1.Qb3?
- threat
- 2.Qxd5#
- 1...Qf6+
- 2.Bxf6#
- 1...Ke5
- 2.Qxd5#
- 1...Qe5
- 2.Sb5#
- 2.Qxd1#
- 2.Qa4#
- 2.Qd3#
- 2.Qb4#
- 1...Sc3
- 2.Qxc3#
- 1...Se3
- 2.Qxb2#
- 2.Qxe3#
- 1...Rxg5!
- threat
- 1.Kb6?
- Keys
- 1.Rb3!
- 1...Qf6+
- 2.Bxf6#
- 1...Rxg5
- 2.Qf4#
- 1...g1Q
- 2.Rd2#
- 1...g1S
- 2.Rd2#
- 1...g1B
- 2.Rd2#
- 1...g1R
- 2.Rd2#
- 1...Qe5
- 2.Qb4#
- 1...Qh6
- 2.Bf6#
- 1...Qf8
- 2.Bf6#
- 1...Qh7
- 2.Bf6#
- 1...Qg8
- 2.Bf6#
- 1...Rg3
- 2.Qf4#
- 1...Re4
- 2.Rd3#
- 1...Rf4
- 2.Qxf4#
- 1...Rh4
- 2.Rxh4#
- 1...Sf2
- 2.Be3#
- 1...Sc3
- 2.Rb4#
- 1...Se3
- 2.Bxe3#
- 1...f5
- 2.Se6#
- 1...f6
- 2.Se6#
- 1...Qf6+
- 1.Rb3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(j);SBLOCK::QAR2(H)
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- Q(j);N_GUARD::B(F)
- R(f);N_GUARD::QAR2(H)
- R(f);SBLOCK::R1(D)
- R(f);N_GUARD::QAR2(H),XR(f)
- R(f);OGATEB::R(B),XR(f)
- R(f);N_GUARD,XB(F)::QAR2(H)
- S(a);N_GUARD::QAB(H),XP(c)
- S(a);N_GUARD,SBLOCK::B(F)
- P(d);OGATE::R(B)
- P(i);N_GUARD::S(I)
- Tries
- Try
- K(G);P-FLIGHT
- Threat
- S(I)
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- Refutation
- S(a);
- Try
- S(C);CHECK
- Refutation
- K(e);P-FLIGHT
- Try
- B(F);CHECK
- Vars
- S(a);XB(F)::QAB(H),XP(c)
- Refutation
- K(e);S_FLIGHT
- Try
- B(F);
- Threat
- QAR2(H)
- Vars
- R(f);OGATE,XB(F)::QAR2(H),XR(f)
- S(a);N_GUARD::QAB(H),XP(c)
- Refutation
- Q(j);CHECK
- Try
- B(F);
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- R(f);OGATE,XB(F)::R(B),XR(f)
- S(a);N_GUARD::QAB(H),XP(c)
- P(d);OGATE::R(B)
- Q(j);SBLOCK::QAR2(H)
- Q(j);N_GUARD::B(F)
- R(f);N_GUARD::QAR2(H)
- R(f);SBLOCK::R1(D)
- R(f);N_GUARD::QAR2(H),XR(f)
- S(a);N_GUARD::B(F)
- P(i);N_GUARD::S(I)
- Refutation
- P(h);
- Try
- R(B);XP(d)
- Threat
- DUALS(2)
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- R(f);N_GUARD,XR(B)::QAR2(H)
- S(a);N_GUARD::QAB(H),XP(c)
- R(f);::R(B)
- Refutation
- B(b);XR(B)
- Try
- R(D);
- Threat
- QAR2(H)
- Vars
- R(f);N_GUARD,XB(F)::QAR2(H)
- S(a);N_GUARD,XR(D)::QAB(H),XP(c)
- R(f);N_GUARD::QAR2(H),XR(f)
- R(f);SBLOCK::R1(D)
- Refutation
- Q(j);CHECK
- Try
- R(D);
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- R(f);N_GUARD,XB(F)::QAR2(H)
- S(a);N_GUARD::QAB(H),XP(c)
- P(d);OGATE::R(B)
- Q(j);SBLOCK::QAR2(H)
- Q(j);N_GUARD::B(F)
- R(f);SBLOCK::R1(D)
- R(f);N_GUARD::QAR2(H),XR(f)
- R(f);OGATEB::R(B),XR(f)
- S(a);N_GUARD,SBLOCK::B(F)
- P(i);N_GUARD::S(I)
- Refutation
- R(f);XR(D)
- Try
- Q(H);CHECK,XP(c)
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(H),XS(a)
- Refutation
- S(a);XQ(H)
- Try
- Q(H);
- Threat
- QAR1(H),XP(g)
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- K(e);S_FLIGHT::QAR1(H),XP(g)
- S(a);N_GUARD::QAB1(H),XS(a)
- Refutation
- R(f);XB(F)
- Try
- Actual
- R(D);
- Vars
- Q(j);CHECK,N_GUARD::B(F),XQ(j)
- R(f);N_GUARD,XB(F)::QAR2(H)
- P(d);OGATE::R(B)
- Q(j);SBLOCK::QAR2(H)
- Q(j);N_GUARD::B(F)
- R(f);N_GUARD::QAR2(H)
- R(f);SBLOCK::R1(D)
- R(f);N_GUARD::QAR2(H),XR(f)
- R(f);OGATEB::R(B),XR(f)
- S(a);N_GUARD::B(F)
- S(a);SBLOCK::R(D)
- S(a);N_GUARD::B(F),XS(a)
- P(i);N_GUARD::S(I)
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).