MESON Chess Problem Database
Problem Display
PID: 152531 (8/2p1p3/1pB1pp2/1Np1k2N/6p1/K2P2R1/3PrR2/1b5Q w - - 0 1)
Fenner, A Jack
Harley, Brian
The Observer, 1929
(First published on Sun Oct 20 1929)
#2
9 + 10
| 15290 | Harley Scrapbook | 2014 |
| 56 | The Problemist | 2015 |
| 15239 | Valois Notebooks | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Qxe1#
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...Bxd3
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxe2#
- 1...Re1
- Tries
- 1.Ka4?
- 1...Re4+
- 2.Qxe4#
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Re3
- 2.Rxe3#
- 1...Ba2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxe2#
- 1...Bc2+!
- 1...Re4+
- 1.Sg7?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Rxd2
- 1.Bb7?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxe2#
- 1...c6!
- 1...Rxd2
- 1.Ba8?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxe2#
- 1...c6!
- 1...Rxd2
- 1.Rf4?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Rf2
- 2.Re3#
- 2.Qe4#
- 1...Rg2
- 2.Re3#
- 1...Rh2
- 2.Re3#
- 2.Qe4#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5!
- 1...Rxd2
- 1.Rf5+?
- 1...exf5
- 2.Qd5#
- 1...Kxf5!
- 1...exf5
- 1.Rxf6?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...Re1
- 2.Qxe1#
- 1...Rf2
- 2.Re3#
- 2.Qe4#
- 1...Rg2
- 2.Re3#
- 1...Rh2
- 2.Re3#
- 2.Qe4#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...exf6!
- 1...Rxd2
- 1.Rh3?
- 1...Rxd2
- 2.Re3#
- 2.Qe4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qa1#
- 1...gxh3
- 2.Qh2#
- 1...Re1
- 2.Qxe1#
- 1...Re3
- 2.Rxe3#
- 1...Re4
- 2.Qxe4#
- 1...Ba2
- 2.Qa1#
- 1...Bc2
- 2.Qa1#
- 1...c4
- 2.d4#
- 1...f5
- 2.Rxe2#
- 1...g3!
- 1...Rxd2
- 1.Rxg4?
- threat
- 2.Qh2#
- 1...Rxf2
- 2.Qe4#
- 1...Re4
- 2.Rxe4#
- 2.Qxe4#
- 1...f5
- 2.Rxe2#
- 1...Re3!
- threat
- 1.Qf3?
- threat
- 2.Rxe2#
- 2.Qxe2#
- 2.Qf4#
- 1...Rxd2
- 2.Qe4#
- 2.Qe3#
- 2.Qf4#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Qf4#
- 1...Re1
- 2.Qf4#
- 1...Re3
- 2.Qxe3#
- 2.Qf4#
- 1...Re4
- 2.Qxe4#
- 1...gxf3!
- threat
- 1.Qe1?
- threat
- 2.Qxe2#
- 1...Bxd3
- 2.Qa1#
- 1...Re3
- 2.Rxe3#
- 2.Qxe3#
- 1...Re4
- 2.Qxe4#
- 1...Rxe1!
- threat
- 1.Ka4?
- Keys
- 1.Sf4!
- threat
- 2.Sg6#
- 1...Kf5
- 2.Qh5#
- 1...Rxf2
- 2.Qe4#
- 1...Bxd3
- 2.Sxd3#
- 1...f5
- 2.Qh8#
- threat
- 1.Sf4!
This is a version
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD,XR(C)::QAR1(A)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- B(a);OGATE,XP(E)::QAB(A)
- P(d);N_GUARD::P(E)
- P(h);SBLOCK::R(C),XR(b)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- R(b);CHECK,N_GUARD::QAR1(A),XR(b)
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD::R(F),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- P(h);SBLOCK::R(C),XR(b)
- Refutation
- B(a);CHECK
- Try
- S(H);
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- Refutation
- P(h);
- Try
- B(I);
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- P(h);SBLOCK::R(C),XR(b)
- Refutation
- P(i);
- Try
- B(I);
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- P(h);SBLOCK::R(C),XR(b)
- Refutation
- P(i);
- Try
- R(C);
- Vars
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD::R(F)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- Refutation
- P(h);
- Try
- R(C);CHECK
- Vars
- P(g);SBLOCK,XR(C)::QAR1(A)
- Refutation
- K(e);P-FLIGHT,XR(C)
- Try
- R(C);XP(h)
- Vars
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD::R(F)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- Refutation
- P(j);XR(C)
- Try
- R(F);
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);OGATE,XP(E)::QAB(A)
- P(c);N_GUARD,XR(F)::QAB(A)
- R(b);OGATEB::QAR(A),XR(b)
- R(b);N_GUARD,P_PINP(E)::R(F),XR(b)
- R(b);N_GUARD::QAR1(A),XR(b)
- B(a);OGATE::QAB(A)
- P(d);N_GUARD::P(E)
- P(h);SBLOCK::R(C),XR(b)
- Refutation
- P(c);
- Try
- R(F);XP(c)
- Threat
- QAB(A)
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- P(h);SBLOCK::R(C),XR(b)
- Refutation
- R(b);P_PINP(E)
- Try
- Q(A);
- Threat
- DUALS(3)
- Vars
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);XP(E)::QAB1(A)
- R(b);::QAB1(A)
- R(b);N_GUARD::QAR1(A),XR(b)
- Refutation
- P(c);XQ(A)
- Try
- Q(A);P_PINR(b)
- Threat
- QAR(A),XR(b)
- Vars
- B(a);OGATE,XP(E)::QAB(A)
- R(b);OGATE::QAR1(A),XR(b)
- Refutation
- R(b);N_SPINR(b),XQ(A)
- Try
- Actual
- S(H);
- Threat
- S(H)
- Vars
- K(e);P-FLIGHT::QAR2(A)
- R(b);N_GUARD,XR(C)::QAR1(A)
- B(a);XP(E)::S(H),XB(a)
- P(h);OGATEB,SBLOCK::QAB(A)
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).