MESON Chess Problem Database
Problem Display
PID: 194412 (4Q3/1p1p1N2/3Bnp2/4bN2/4k1P1/7p/K2R1Rr1/7B w - - 0 1)
Andrade, Barry Jack da Costa
The Observer, 1940
(First published on Sun Jul 7 1940)
#2
9 + 8
| 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.Rd4#
- 2.Rxf4#
- 1...Bxd6
- 2.Rd4#
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Ba1
- Tries
- 1.Kb3?
- 1...Sd4+
- 2.Rxd4#
- 1...Bxd6
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf4
- 2.Rd4#
- 2.Rxf4#
- 1...Sf4
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Sc5+!
- 1...Sd4+
- 1.Sxe5?
- 1...Sd4
- 2.Rxd4#
- 1...Sf4
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...fxe5!
- 1...Sd4
- 1.Sg5+?
- 1...Sxg5
- 2.Rd4#
- 1...fxg5!
- 1...Sxg5
- 1.S7h6?
- 1...Bd4
- 2.Rxd4#
- 1...Sd4
- 2.Rxd4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf4
- 2.Rd4#
- 2.Rxf4#
- 1...Sf4
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Bxd6!
- 1...Bd4
- 1.Sh8?
- 1...Bd4
- 2.Rxd4#
- 1...Sd4
- 2.Rxd4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf4
- 2.Rd4#
- 2.Rxf4#
- 1...Sf4
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Bxd6!
- 1...Bd4
- 1.Kb3?
- Keys
- 1.Kb1!
- 1...Bxd6
- 2.Rd4#
- 1...Bd4
- 2.Rxd4#
- 1...Sd4
- 2.Rxd4#
- 1...Ba1
- 2.Rf4#
- 1...Bb2
- 2.Rf4#
- 1...Bh2
- 2.Rd4#
- 1...Bc3
- 2.Rf4#
- 1...Bg3
- 2.Rd4#
- 1...Bf4
- 2.Rd4#
- 2.Rxf4#
- 1...Sf4
- 2.Rd4#
- 1...Sc5
- 2.Rd4#
- 1...Sg5
- 2.Rd4#
- 1...Sc7
- 2.Rd4#
- 1...Sg7
- 2.Rd4#
- 1...Sd8
- 2.Rd4#
- 1...Sf8
- 2.Rd4#
- 1...h2
- 2.Bxg2#
- 1...b5
- 2.Qa8#
- 1...b6
- 2.Qa8#
- 1...Bxd6
- 1.Kb1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(d);N_GUARD,P_SPINS(e)::R1(D)
- B(d);N_GUARD,P_SPINS(e)::R1(C)
- B(d);N_GUARD,P_SPINS(e)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(e),XB(G)::R1(C)
- S(e);N_GUARD,P_SPINB(d)::R1(C),XS(e)
- S(e);N_GUARD,P_SPINB(d)::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(I)
- Tries
- Try
- K(B);S_FLIGHT
- Vars
- S(e);CHECK,N_GUARD,P_SPINB(d)::R1(C),XS(e)
- B(d);N_GUARD,P_SPINS(e),XB(G)::R1(C)
- B(d);N_GUARD,P_SPINS(e)::R1(C),XB(d)
- B(d);N_GUARD,P_SPINS(e)::R1(D)
- B(d);N_GUARD,P_SPINS(e)::R1(C)
- S(e);N_GUARD,P_SPINB(d)::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(I)
- Refutation
- S(e);CHECK,P_SPINB(d)
- Try
- S(H);XB(d)
- Vars
- S(e);N_GUARD::R1(C),XS(e)
- S(e);N_GUARD::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(I)
- Refutation
- P(f);XS(H)
- Try
- S(H);CHECK
- Vars
- S(e);P_SPINB(d),XS(H)::R1(C)
- Refutation
- P(f);XS(H)
- Try
- S(H);
- Vars
- B(d);N_GUARD,P_SPINS(e)::R1(C),XB(d)
- S(e);N_GUARD,P_SPINB(d)::R1(C),XS(e)
- B(d);N_GUARD,P_SPINS(e)::R1(D)
- B(d);N_GUARD,P_SPINS(e)::R1(C)
- S(e);N_GUARD,P_SPINB(d)::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(I)
- Refutation
- B(d);P_SPINS(e),XB(G)
- Try
- S(H);
- Vars
- B(d);N_GUARD,P_SPINS(e)::R1(C),XB(d)
- S(e);N_GUARD,P_SPINB(d)::R1(C),XS(e)
- B(d);N_GUARD,P_SPINS(e)::R1(D)
- B(d);N_GUARD,P_SPINS(e)::R1(C)
- S(e);N_GUARD,P_SPINB(d)::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(I)
- Refutation
- B(d);P_SPINS(e),XB(G)
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- B(d);N_GUARD,P_SPINS(e),XB(G)::R1(C)
- B(d);N_GUARD,P_SPINS(e)::R1(C),XB(d)
- S(e);N_GUARD,P_SPINB(d)::R1(C),XS(e)
- B(d);N_GUARD,P_SPINS(e)::R1(D)
- B(d);N_GUARD,P_SPINS(e)::R1(C)
- S(e);N_GUARD,P_SPINB(d)::R1(C)
- P(b);N_GUARD::B(A),XR(a)
- P(g);OGATEB::QAB(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).