MESON Chess Problem Database
Problem Display
PID: 155066 (8/8/2r2p2/R1r2N1K/6pb/1QNPPkBP/1n2nP1R/3B1b2 w - - 0 1)
Onkoud, Abdelaziz
Die Schwalbe, 2014
#2
12 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxc3
- 2.Sd4#
- 2.Sxh4#
- 2.Qd5#
- 1...Rc4
- 2.Sxh4#
- 1...Rd5
- 2.Qxd5#
- 1...Rxf5+
- 2.Rxf5#
- 1...Bg2
- 2.Bxe2#
- 1...Bxh3
- 2.Bxe2#
- 1...Bg5
- 2.Sd4#
- 1...Rxc3
- Tries
- 1.Kg6?
- threat
- 2.Sd4#
- 2.Sxh4#
- 1...Rxf5
- 2.Rxf5#
- 1...Bxg3
- 2.Sd4#
- 1...Sxd1
- 2.Sxh4#
- 1...Rc4
- 2.Sxh4#
- 1...Rd5
- 2.Sxh4#
- 2.Qxd5#
- 1...Rd6
- 2.Sxh4#
- 1...Bg5
- 2.Sd4#
- 1...gxh3!
- threat
- 1.Sb1?
- threat
- 2.Sd2#
- 1...Rxf5+
- 2.Rxf5#
- 1...Rc2
- 2.Sd4#
- 2.Sxh4#
- 2.Qd5#
- 1...Sc4!
- threat
- 1.Se4?
- threat
- 2.Sd2#
- 1...Rxf5+
- 2.Rxf5#
- 1...Rc2
- 2.Sd4#
- 2.Sxh4#
- 1...Sc4!
- threat
- 1.Sd5?
- threat
- 2.Sd4#
- 2.Sxh4#
- 1...Rxd5
- 2.Qxd5#
- 1...Bxg3
- 2.Sd4#
- 1...Sxd1
- 2.Sxh4#
- 1...Rc4
- 2.Sxh4#
- 1...Bg5
- 2.Sd4#
- 1...Sxd3!
- threat
- 1.Rxc5?
- threat
- 2.Sd4#
- 2.Sxh4#
- 2.Qd5#
- 1...Bxg3
- 2.Sd4#
- 2.Qd5#
- 1...Sxd1
- 2.Sxh4#
- 2.Qd5#
- 1...Sc4
- 2.Sd4#
- 2.Sxh4#
- 1...Rd6
- 2.Sxh4#
- 1...Re6
- 2.Sd4#
- 2.Sxh4#
- 1...Bg5
- 2.Sd4#
- 2.Qd5#
- 1...Rxc5!
- threat
- 1.Qc4?
- threat
- 2.Qe4#
- 2.Qf4#
- 2.Qxg4#
- 1...Rxf5+
- 2.Rxf5#
- 1...Rxc4
- 2.Sxh4#
- 1...Bxh3
- 2.Bxe2#
- 2.Qe4#
- 2.Qf4#
- 1...Bxg3
- 2.Qe4#
- 2.Qxg4#
- 1...Sxd1
- 2.Qe4#
- 2.Qxg4#
- 1...Sxd3
- 2.Qe4#
- 2.Qxg4#
- 1...gxh3
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Re5
- 2.Qf4#
- 2.Qxg4#
- 1...Re6
- 2.Qf4#
- 2.Qxg4#
- 1...Bg5
- 2.Sd4#
- 2.Qe4#
- 2.Qxg4#
- 1...Sxc4!
- threat
- 1.Qb4?
- threat
- 2.Qe4#
- 2.Qf4#
- 2.Qxg4#
- 1...Rxf5+
- 2.Rxf5#
- 1...Bxh3
- 2.Bxe2#
- 2.Qe4#
- 2.Qf4#
- 1...Bxg3
- 2.Qe4#
- 2.Qxg4#
- 1...Sxd1
- 2.Qe4#
- 2.Qxg4#
- 1...Sxd3
- 2.Qe4#
- 2.Qxg4#
- 1...gxh3
- 2.Qe4#
- 2.Qf4#
- 2.Qg4#
- 1...Rc4
- 2.Sxh4#
- 1...Re5
- 2.Qf4#
- 2.Qxg4#
- 1...Re6
- 2.Qf4#
- 2.Qxg4#
- 1...Bg5
- 2.Sd4#
- 2.Qe4#
- 2.Qxg4#
- 1...Sc4!
- threat
- 1.Kg6?
- Keys
- 1.Qg8!
- threat
- 2.Qxg4#
- 1...Rxf5+
- 2.Rxf5#
- 1...Bxh3
- 2.Bxe2#
- 1...gxh3
- 2.Qg4#
- 1...Rc4
- 2.Sxh4#
- 1...Bg5
- 2.Sd4#
- threat
- 1.Qg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- R(g);N_PINS(K)::S(K),XB(f)
- R(g);N_GUARD::QAB(D),XR(g)
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- B(a);N_GUARD::B(A),XS(c)
- B(a);N_GUARD,XP(I)::B(A),XS(c)
- B(f);N_PINS(K)::S(K)
- Tries
- Try
- K(L);N_SPINS(K),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,XS(K)::R(J),XR(g)
- B(f);XB(H)::S(K)
- S(b);N_SPINS(c),XB(A)::S(K),XB(f)
- R(g);::S(K),XB(f)
- R(h);::S(K),XB(f)
- B(f);::S(K)
- Refutation
- P(e);XP(I)
- Try
- S(E);
- Threat
- S(E)
- Vars
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- Refutation
- S(b);
- Try
- S(E);
- Threat
- S(E)
- Vars
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- Refutation
- S(b);
- Try
- S(E);N_SPINS(K)
- Threat
- DUALS(2)
- Vars
- R(g);OGATE,P_PINS(K),XS(E)::QAB(D),XR(g)
- B(f);XB(H)::S(K)
- S(b);N_SPINS(c),XB(A)::S(K),XB(f)
- R(g);::S(K),XB(f)
- B(f);::S(K)
- Refutation
- S(b);XP(F)
- Try
- R(J);N_SPINS(K),XR(g)
- Threat
- DUALS(3)
- Vars
- R(h);::S(K),XB(f)
- Refutation
- R(h);P_PINS(K),XR(J)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- R(g);N_PINS(K),XQ(D)::S(K),XB(f)
- Refutation
- S(b);XQ(D)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- R(g);N_PINS(K)::S(K),XB(f)
- Refutation
- S(b);
- Try
- Actual
- Q(D);
- Threat
- QAB1(D),XP(e)
- Vars
- R(g);CHECK,OGATE,XS(K)::R(J),XR(g)
- B(a);N_GUARD,XP(I)::B(A),XS(c)
- P(e);XP(I)::QAB1(D)
- R(g);N_PINS(K)::S(K),XB(f)
- B(f);N_PINS(K)::S(K)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).