MESON Chess Problem Database
Problem Display
PID: 169889 (6r1/4pNR1/2P1kb2/2ppPp2/n3PKb1/2QN4/4B3/8 w - - 0 1)
Mariz Graca, Jose Gabriel
5th Prize, Os Sports, 1945
#2
9 + 9
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rxg7
- 2.Sd8#
- 1...Rd8
- 2.Sxd8#
- 1...Bxe2
- 2.exf5#
- 1...Bf3
- 2.exf5#
- 1...Bh5
- 2.exf5#
- 1...Bxe5+
- 2.Qxe5#
- 1...Bg5+
- 2.Sxg5#
- 1...Bxg7
- 2.Sg5#
- 1...Sb2
- 2.Sxc5#
- 1...Sxc3
- 2.Sxc5#
- 1...Sb6
- 2.Sxc5#
- 1...dxe4
- 2.Qc4#
- 1...d4
- 2.Qc4#
- 1...fxe4
- 2.Bxg4#
- 1...Rxg7
- Tries
- 1.Ke3?
- threat
- 2.Sf4#
- 1...Bg5+
- 2.Sxg5#
- 1...f4+
- 2.Sxf4#
- 1...Rxg7
- 2.Sd8#
- 1...Bxe5
- 2.Qxe5#
- 1...Bxg7
- 2.Sg5#
- 1...fxe4
- 2.Bxg4#
- 1...d4+!
- threat
- 1.Kg3?
- threat
- 2.Sf4#
- 1...Bxe5+
- 2.Qxe5#
- 1...f4+
- 2.Sxf4#
- 1...Rxg7
- 2.Sd8#
- 1...Bxg7
- 2.Sg5#
- 1...fxe4
- 2.Bxg4#
- 1...Bg5
- 2.Sxg5#
- 1...Bh4+!
- threat
- 1.Bxg4?
- threat
- 2.Bxf5#
- 2.exf5#
- 1...Bxe5+
- 2.Qxe5#
- 1...Bg5+
- 2.Sxg5#
- 1...Rxg7
- 2.Sd8#
- 1...Bxg7
- 2.Sg5#
- 1...dxe4
- 2.Qc4#
- 1...d4
- 2.Bxf5#
- 2.Qc4#
- 1...fxg4!
- threat
- 1.Rg6?
- threat
- 2.Sg5#
- 1...Rxg6
- 2.Sd8#
- 1...dxe4
- 2.Qc4#
- 1...Kxf7!
- threat
- 1.Qd4?
- threat
- 2.Qxd5#
- 2.exd5#
- 1...Bxe5+
- 2.Qxe5#
- 1...Bg5+
- 2.Sxg5#
- 1...Rxg7
- 2.Sd8#
- 2.Qxd5#
- 1...Bxg7
- 2.Sg5#
- 2.Qxd5#
- 1...dxe4
- 2.Qc4#
- 2.Qd7#
- 1...fxe4
- 2.Bxg4#
- 1...Rd8
- 2.Sxd8#
- 1...Bf3
- 2.Qxd5#
- 2.exf5#
- 1...Sc3
- 2.Sxc5#
- 1...Sb6
- 2.Sxc5#
- 1...cxd4!
- threat
- 1.Ke3?
- Keys
- 1.Bf3!
- threat
- 2.exd5#
- 1...Bxe5+
- 2.Qxe5#
- 1...Bg5+
- 2.Sxg5#
- 1...Rxg7
- 2.Sd8#
- 1...Bxf3
- 2.exf5#
- 1...Bxg7
- 2.Sg5#
- 1...Sxc3
- 2.Sxc5#
- 1...dxe4
- 2.Qc4#
- 1...fxe4
- 2.Bxg4#
- 1...Rd8
- 2.Sxd8#
- 1...Sb6
- 2.Sxc5#
- 1...d4
- 2.Qc4#
- threat
- 1.Bf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(i);N_GUARD,XR(I)::S(H)
- R(i);N_GUARD::S(H),XR(i)
- B(b);N_GUARD,XB(A)::P(D),XP(e)
- B(b);N_GUARD::P(D),XP(e)
- B(g);CHECK,OGATE,XP(F)::QAR1(B),XB(g)
- B(g);CHECK,N_GUARD::S(H),XB(g)
- B(g);N_GUARD,XR(I)::S(H)
- S(a);N_GUARD::S(C),XP(c)
- S(a);N_GUARD,XQ(B)::S(C),XP(c)
- P(d);OGATEB,XP(D)::QAB(B)
- P(d);OGATEB::QAB(B)
- P(e);OGATEB,XP(D)::B(A),XB(b)
- Tries
- Try
- K(E);S_FLIGHT
- Threat
- S(C)
- Vars
- B(g);CHECK,N_GUARD::S(H),XB(g)
- P(e);CHECK::S(C),XP(e)
- R(i);N_GUARD,XR(I)::S(H)
- B(g);OGATE,XP(F)::QAR1(B),XB(g)
- B(g);N_GUARD,XR(I)::S(H)
- P(e);OGATEB,XP(D)::B(A),XB(b)
- Refutation
- P(d);CHECK
- Try
- K(E);S_FLIGHT
- Threat
- S(C)
- Vars
- B(g);CHECK,OGATE,XP(F)::QAR1(B),XB(g)
- P(e);CHECK::S(C),XP(e)
- R(i);N_GUARD,XR(I)::S(H)
- B(g);N_GUARD,XR(I)::S(H)
- P(e);OGATEB,XP(D)::B(A),XB(b)
- B(g);N_GUARD::S(H),XB(g)
- Refutation
- B(g);CHECK
- Try
- B(A);P_PINP(e),XB(b)
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,OGATE,XP(F)::QAR1(B),XB(g)
- B(g);CHECK,N_GUARD::S(H),XB(g)
- R(i);N_GUARD,XR(I)::S(H)
- B(g);N_GUARD,XR(I)::S(H)
- P(d);OGATEB,XP(D)::QAB(B)
- Refutation
- P(e);N_SPINP(e),XB(A)
- Try
- R(I);P_PINB(g)
- Threat
- S(H)
- Vars
- R(i);N_GUARD,N_SPINB(g),XR(I)::S(H)
- P(d);OGATEB,XP(D)::QAB(B)
- Refutation
- K(f);N_SPINB(g),S_FLIGHT,XS(H)
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(g);CHECK,OGATE,XP(F)::QAR1(B),XB(g)
- B(g);CHECK,N_GUARD::S(H),XB(g)
- P(e);OGATEB,XP(D)::B(A),XB(b)
- R(i);N_GUARD::S(H),XR(i)
- S(a);N_GUARD::S(C),XP(c)
- Refutation
- P(c);XQ(B)
- Try
- Actual
- B(A);
- Threat
- P(D),XP(d)
- Vars
- B(g);CHECK,OGATE,XP(F)::QAR1(B),XB(g)
- B(g);CHECK,N_GUARD::S(H),XB(g)
- R(i);N_GUARD,XR(I)::S(H)
- B(b);N_GUARD,XB(A)::P(D),XP(e)
- B(g);N_GUARD,XR(I)::S(H)
- S(a);N_GUARD,XQ(B)::S(C),XP(c)
- P(d);OGATEB,XP(D)::QAB(B)
- P(e);OGATEB,XP(D)::B(A),XB(b)
- R(i);N_GUARD::S(H),XR(i)
- S(a);N_GUARD::S(C),XP(c)
- P(d);OGATEB::QAB(B)
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).