MESON Chess Problem Database
Problem Display
PID: 356 (RR6/2p1p3/1qPbB3/P2Q4/rk1B1P2/p7/pn4p1/n5Kb w - - 0 1)
Warton, Joseph John
Warton, Thomas Joseph
The Observer, 1929
(First published on Sun Jun 16 1929)
#2
9 + 12
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qb7
- 2.Rxb7#
- 1...Qxb8
- 2.Rxb8#
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- Tries
- 1.Bf2?
- 1...Qxb8
- 2.Be1#
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Be1#
- 2.Qd2#
- 1...Qb7
- 2.Be1#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Kc3!
- 1...Qxb8
- 1.Ra6?
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qb7
- 2.Rxb7#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Qxb8!
- 1...Rxa5
- 1.Ra7?
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qb7
- 2.Raxb7#
- 2.Rbxb7#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Qxb8!
- 1...Rxa5
- 1.Rb7?
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Qxb7!
- 1...Rxa5
- 1.Qxd6+?
- 1...Kb5
- 2.Qc5#
- 1...cxd6
- 2.Rxb6#
- 1...exd6!
- 1...Kb5
- 1.f5?
- 1...Qxb8
- 2.Rxb8#
- 1...Rxa5
- 2.Qxa5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Rxb5#
- 2.Qxb5#
- 1...Qb7
- 2.Rxb7#
- 1...Bg3
- 2.Qc5#
- 1...Bf4
- 2.Qc5#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Bh2+!
- 1...Qxb8
- 1.Bf2?
- Keys
- 1.Be3!
- 1...Kc3
- 2.Qd2#
- 1...Qxb8
- 2.Bd2#
- 1...Rxa5
- 2.Qxa5#
- 1...Bxf4
- 2.Qc5#
- 1...Bc5
- 2.Qxc5#
- 1...Sc4
- 2.Qxc4#
- 1...Qb5
- 2.Bd2#
- 2.Qd2#
- 1...Qb7
- 2.Bd2#
- 1...Be5
- 2.Qc5#
- 1...Sc2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd1
- 2.Qc4#
- 1...Sd3
- 2.Qc4#
- 1...Kc3
- 1.Be3!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(i);N_PINB(B),OGATEB::R(I),XQ(i)
- Q(i);N_PINB(B),N_SPINQ(i),OGATE,XR(I)::R(H),XQ(i)
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- Tries
- Try
- B(B);
- Vars
- Q(i);N_PINB(B),N_SPINQ(i),XR(I)::B(B)
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- Q(i);N_PINB(B)::B(B)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- Refutation
- K(h);N_SPINQ(i),S_FLIGHT
- Try
- R(H);
- Vars
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- Q(i);N_PINB(B),OGATEB::R(I),XQ(i)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- Refutation
- Q(i);N_PINB(B),N_SPINQ(i),XR(I)
- Try
- R(H);
- Vars
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- Refutation
- Q(i);N_PINB(B),N_SPINQ(i),XR(I)
- Try
- R(I);
- Vars
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- Refutation
- Q(i);N_PINB(B),N_SPINQ(i),XR(I)
- Try
- Q(E);CHECK,XB(j)
- Vars
- K(h);P-FLIGHT::QAR1(E)
- P(k);XQ(E)::R(I),XQ(i)
- Refutation
- P(l);XQ(E)
- Try
- P(C);
- Vars
- Q(i);N_PINB(B),N_SPINQ(i),OGATE,XR(I)::R(H),XQ(i)
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- Q(i);N_PINB(B),OGATEB::R(I),XQ(i)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(E)
- Refutation
- B(j);CHECK
- Try
- Actual
- B(B);
- Vars
- K(h);N_SPINQ(i),S_FLIGHT::QAB1(E)
- Q(i);N_PINB(B),N_SPINQ(i),XR(I)::B(B)
- R(g);OGATE,XP(D)::QAB1(E),XR(g)
- B(j);N_GUARD,XP(C)::QAB1(E)
- B(j);N_GUARD::QAB1(E),XB(j)
- S(d);N_GUARD::QAR1(E),XS(d)
- Q(i);N_PINB(B)::B(B)
- B(j);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAR1(E)
- S(a);N_GUARD::QAR1(E),XS(a)
- S(d);N_GUARD::QAR1(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).