MESON Chess Problem Database
Problem Display
PID: 198983 (2Rb2K1/1Qp5/p7/2k2N2/2P2n2/1P4Bn/8/8 w - - 0 1)
Dale, John
The Observer, 1944
(First published on Sun Nov 19 1944)
#2
7 + 6
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bh4
- 2.Rxc7#
- 1...Bg5
- 2.Rxc7#
- 1...Bf6
- 2.Rxc7#
- 1...Be7
- 2.Rxc7#
- 1...Sg1
- 2.Bf2#
- 1...Sf2
- 2.Bxf2#
- 1...Sg5
- 2.Bf2#
- 1...Se2
- 2.Bd6#
- 1...Sg2
- 2.Bd6#
- 1...Sd3
- 2.Bd6#
- 1...Sd5
- 2.Bd6#
- 1...Sh5
- 2.Bd6#
- 1...Se6
- 2.Bd6#
- 1...Sg6
- 2.Bd6#
- 1...a5
- 2.Qb5#
- 1...c6
- 2.Rxc6#
- 1...Bh4
- Tries
- 1.Kf7?
- 1...Bh4
- 2.Rxc7#
- 1...Bg5
- 2.Rxc7#
- 1...Bf6
- 2.Rxc7#
- 1...Be7
- 2.Rxc7#
- 1...Sg1
- 2.Bf2#
- 1...Sf2
- 2.Bxf2#
- 1...Se2
- 2.Bd6#
- 1...Sg2
- 2.Bd6#
- 1...Sd3
- 2.Bd6#
- 1...Sd5
- 2.Bd6#
- 1...Sh5
- 2.Bd6#
- 1...Se6
- 2.Bd6#
- 1...Sg6
- 2.Bd6#
- 1...a5
- 2.Qb5#
- 1...c6
- 2.Rxc6#
- 1...Sg5+!
- 1...Bh4
- 1.Kh7?
- 1...Bh4
- 2.Rxc7#
- 1...Bg5
- 2.Rxc7#
- 1...Bf6
- 2.Rxc7#
- 1...Be7
- 2.Rxc7#
- 1...Sg1
- 2.Bf2#
- 1...Sf2
- 2.Bxf2#
- 1...Se2
- 2.Bd6#
- 1...Sg2
- 2.Bd6#
- 1...Sd3
- 2.Bd6#
- 1...Sd5
- 2.Bd6#
- 1...Sh5
- 2.Bd6#
- 1...Se6
- 2.Bd6#
- 1...Sg6
- 2.Bd6#
- 1...a5
- 2.Qb5#
- 1...c6
- 2.Rxc6#
- 1...Sg5+!
- 1...Bh4
- 1.Bh2?
- 1...Bh4
- 2.Rxc7#
- 1...Bg5
- 2.Rxc7#
- 1...Bf6
- 2.Rxc7#
- 1...Be7
- 2.Rxc7#
- 1...Sg1
- 2.Bxg1#
- 1...Sg5
- 2.Bg1#
- 1...Se2
- 2.Bd6#
- 1...Sg2
- 2.Bd6#
- 1...Sd3
- 2.Bd6#
- 1...Sd5
- 2.Bd6#
- 1...Sh5
- 2.Bd6#
- 1...Se6
- 2.Bd6#
- 1...Sg6
- 2.Bd6#
- 1...a5
- 2.Qb5#
- 1...c6
- 2.Rxc6#
- 1...Sf2!
- 1...Bh4
- 1.Bxf4?
- threat
- 2.Be3#
- 2.Bd6#
- 1...Bg5
- 2.Bd6#
- 2.Rxc7#
- 1...Bf6
- 2.Bd6#
- 2.Rxc7#
- 1...Be7
- 2.Be3#
- 2.Rxc7#
- 1...Sxf4!
- threat
- 1.Rxd8?
- 1...Sg1
- 2.Bf2#
- 1...Sf2
- 2.Bxf2#
- 1...Sg5
- 2.Bf2#
- 1...Se2
- 2.Rd5#
- 1...Sg2
- 2.Rd5#
- 1...Sd3
- 2.Rd5#
- 1...Sd5
- 2.Rxd5#
- 1...Sh5
- 2.Rd5#
- 1...Se6
- 2.Rd5#
- 1...Sg6
- 2.Rd5#
- 1...a5
- 2.Qb5#
- 1...c6!
- 1...Sg1
- 1.Qxa6?
- threat
- 2.Qb5#
- 2.Qd6#
- 1...Be7
- 2.Qb5#
- 1...c6
- 2.Qb5#
- 1...Kb4!
- threat
- 1.Kf7?
- Keys
- 1.Rb8!
- 1...Bh4
- 2.Qxc7#
- 1...Bg5
- 2.Qxc7#
- 1...Bf6
- 2.Qxc7#
- 1...Be7
- 2.Qxc7#
- 1...Sg1
- 2.Bf2#
- 1...Sf2
- 2.Bxf2#
- 1...Sg5
- 2.Bf2#
- 1...Se2
- 2.Qd5#
- 1...Sg2
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sh5
- 2.Qd5#
- 1...Se6
- 2.Qd5#
- 1...Sg6
- 2.Qd5#
- 1...a5
- 2.Qb5#
- 1...c6
- 2.Qb4#
- 1...Bh4
- 1.Rb8!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 12
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(f);N_GUARD::R(F),XP(e)
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(b);OGATE::B(B)
- P(d);N_GUARD::QAR1(E)
- P(e);OGATE::R1(F),XP(e)
- Tries
- Try
- K(G);S_FLIGHT
- Vars
- B(f);N_GUARD::R(F),XP(e)
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(b);OGATE::B(B)
- P(d);N_GUARD::QAR1(E)
- P(e);OGATE::R1(F),XP(e)
- Refutation
- S(a);CHECK
- Try
- K(G);S_FLIGHT
- Vars
- B(f);N_GUARD::R(F),XP(e)
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(b);OGATE::B(B)
- P(d);N_GUARD::QAR1(E)
- P(e);OGATE::R1(F),XP(e)
- Refutation
- S(a);CHECK
- Try
- B(B);
- Vars
- B(f);N_GUARD::R(F),XP(e)
- S(a);N_GUARD::B(B),XS(a)
- S(a);N_GUARD::B(B)
- S(b);OGATE::B(B)
- P(d);N_GUARD::QAR1(E)
- P(e);OGATE::R1(F),XP(e)
- Refutation
- S(a);
- Try
- B(B);XS(b)
- Threat
- DUALS(2)
- Refutation
- S(a);XB(B)
- Try
- R(F);N_PINP(e),XB(f)
- Vars
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(b);N_GUARD::R1(F)
- S(b);N_GUARD::R1(F),XS(b)
- P(d);N_GUARD::QAR1(E)
- Refutation
- P(e);
- Try
- Q(E);XP(d)
- Threat
- DUALS(2)
- Vars
- B(f);::QAR1(E)
- P(e);::QAR1(E)
- Refutation
- K(c);N_SPINP(e),S_FLIGHT
- Try
- Actual
- R(F);N_PINP(e)
- Vars
- B(f);N_GUARD::QAR2(E),XP(e)
- S(a);N_GUARD::B(B)
- S(a);N_GUARD::B(B),XS(a)
- S(b);N_GUARD::QAR1(E)
- S(b);N_GUARD::QAR1(E),XS(b)
- P(d);N_GUARD::QAR1(E)
- P(e);SBLOCK::QAB1(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).