MESON Chess Problem Database
Problem Display
PID: 195807 (4Qn2/8/2Npn3/3Nb3/4k3/7p/K2R1Rr1/7B w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1942
(First published on Sun Mar 15 1942)
#2
7 + 7
| 15239 | Valois Notebooks | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rxf4#
- 1...Sc5
- 2.Rd4#
- 2.Rf4#
- 1...Sg5
- 2.Rd4#
- 2.Rf4#
- 1...Sc7
- 2.Rd4#
- 2.Rf4#
- 1...Sg7
- 2.Rd4#
- 2.Rf4#
- 1...Sd8
- 2.Rd4#
- 2.Rf4#
- 1...Sg6
- 2.Qxg6#
- 1...Sd7
- 2.Qg6#
- 1...Sh7
- 2.Qg6#
- 1...h2
- 2.Bxg2#
- 1...Ba1
- Tries
- 1.Ka3?
- 1...Bd4
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rxf4#
- 1...Ba1
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sc5
- 2.Rd4#
- 2.Rf4#
- 1...Sg5
- 2.Rd4#
- 2.Rf4#
- 1...Sc7
- 2.Rd4#
- 2.Rf4#
- 1...Sg7
- 2.Rd4#
- 2.Rf4#
- 1...Sd8
- 2.Rd4#
- 2.Rf4#
- 1...Sg6
- 2.Qxg6#
- 1...Sd7
- 2.Qg6#
- 1...Sh7
- 2.Qg6#
- 1...h2
- 2.Bxg2#
- 1...Bb2+!
- 1...Bd4
- 1.Kb3?
- 1...Sd4+
- 2.Rxd4#
- 1...Bd4
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 1...Sf4
- 2.Rxf4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sg5
- 2.Rd4#
- 2.Rf4#
- 1...Sc7
- 2.Rd4#
- 2.Rf4#
- 1...Sg7
- 2.Rd4#
- 2.Rf4#
- 1...Sd8
- 2.Rd4#
- 2.Rf4#
- 1...Sg6
- 2.Qxg6#
- 1...Sd7
- 2.Qg6#
- 1...Sh7
- 2.Qg6#
- 1...h2
- 2.Bxg2#
- 1...Sc5+!
- 1...Sd4+
- 1.Qxe6?
- threat
- 2.Rd4#
- 2.Rf4#
- 2.Qf5#
- 1...Sg6
- 2.Rd4#
- 2.Qf5#
- 2.Qxg6#
- 1...Sxe6!
- threat
- 1.Qe7?
- 1...Bd4
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rxf4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sc5
- 2.Rd4#
- 2.Rf4#
- 1...Sg5
- 2.Rd4#
- 2.Rf4#
- 1...Sc7
- 2.Rd4#
- 2.Rf4#
- 1...Sg7
- 2.Rd4#
- 2.Rf4#
- 1...Sd8
- 2.Rd4#
- 2.Rf4#
- 1...Sd7
- 2.Qh7#
- 1...Sh7
- 2.Qxh7#
- 1...h2
- 2.Bxg2#
- 1...Sg6!
- 1...Bd4
- 1.Ka3?
- Keys
- 1.Kb1!
- 1...Bd4
- 2.Rxd4#
- 1...Bf4
- 2.Rxf4#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rxf4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf6
- 2.Rf4#
- 1...Bg7
- 2.Rf4#
- 1...Bh8
- 2.Rf4#
- 1...Sc5
- 2.Rd4#
- 2.Rf4#
- 1...Sg5
- 2.Rd4#
- 2.Rf4#
- 1...Sc7
- 2.Rd4#
- 2.Rf4#
- 1...Sg7
- 2.Rd4#
- 2.Rf4#
- 1...Sd8
- 2.Rd4#
- 2.Rf4#
- 1...Sg6
- 2.Qxg6#
- 1...Sd7
- 2.Qg6#
- 1...Sh7
- 2.Qg6#
- 1...h2
- 2.Bxg2#
- 1...Bd4
- 1.Kb1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(d);N_GUARD,P_SPINS(f)::R1(D)
- B(d);N_GUARD,P_SPINS(f)::R1(C)
- B(d);N_GUARD,P_SPINS(f)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(f)::R1(D),XB(d)
- S(f);N_GUARD,P_SPINB(d)::R1(C),XS(f)
- S(f);N_GUARD,P_SPINB(d)::R1(D),XS(f)
- S(g);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAB(G)
- P(b);N_GUARD::B(A),XR(a)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- B(d);N_GUARD,P_SPINS(f)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(f)::R1(D),XB(d)
- S(f);N_GUARD,P_SPINB(d)::R1(C),XS(f)
- S(f);N_GUARD,P_SPINB(d)::R1(D),XS(f)
- B(d);N_GUARD,P_SPINS(f)::R1(D)
- B(d);N_GUARD,P_SPINS(f)::R1(C)
- S(g);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAB(G)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- B(d);CHECK,P_SPINS(f)
- Try
- K(B);S_FLIGHT
- Vars
- S(f);CHECK,N_GUARD,P_SPINB(d)::R1(C),XS(f)
- B(d);N_GUARD,P_SPINS(f)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(f)::R1(D),XB(d)
- S(f);N_GUARD,P_SPINB(d)::R1(D),XS(f)
- B(d);N_GUARD,P_SPINS(f)::R1(D)
- B(d);N_GUARD,P_SPINS(f)::R1(C)
- S(g);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAB(G)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- S(f);CHECK,P_SPINB(d)
- Try
- Q(G);P_PINB(d),XS(f)
- Threat
- DUALS(3)
- Refutation
- S(g);N_SPINB(d),XQ(G)
- Try
- Q(G);
- Vars
- B(d);N_GUARD,P_SPINS(f)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(f)::R1(D),XB(d)
- S(f);N_GUARD,P_SPINB(d)::R1(C),XS(f)
- S(f);N_GUARD,P_SPINB(d)::R1(D),XS(f)
- B(d);N_GUARD,P_SPINS(f)::R1(D)
- B(d);N_GUARD,P_SPINS(f)::R1(C)
- S(g);N_GUARD::QAB(G)
- S(g);N_GUARD::QAB(G),XS(g)
- P(b);N_GUARD::B(A),XR(a)
- Refutation
- S(g);
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- B(d);N_GUARD,P_SPINS(f)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(f)::R1(D),XB(d)
- S(f);N_GUARD,P_SPINB(d)::R1(C),XS(f)
- S(f);N_GUARD,P_SPINB(d)::R1(D),XS(f)
- B(d);N_GUARD,P_SPINS(f)::R1(D)
- B(d);N_GUARD,P_SPINS(f)::R1(C)
- S(g);N_GUARD::QAB(G),XS(g)
- S(g);N_GUARD::QAB(G)
- P(b);N_GUARD::B(A),XR(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).