MESON Chess Problem Database
Problem Display
PID: 263434 (5r2/1Q6/4N3/2pB4/r1p2p1n/b1BkNb2/1R1P3K/4R3 w - - 0 1)
Onkoud, Abdelaziz
Schweizerische Schachzeitung, 2009
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rb4
- 2.Sxc5#
- 1...Ra5
- 2.Bxc4#
- 1...Ra6
- 2.Bxc4#
- 1...Ra7
- 2.Bxc4#
- 1...Raa8
- 2.Bxc4#
- 1...Rfa8
- 2.Sxf4#
- 1...Rb8
- 2.Sxf4#
- 1...Rc8
- 2.Sxf4#
- 1...Rd8
- 2.Sxf4#
- 1...Re8
- 2.Sxf4#
- 1...Rg8
- 2.Sxf4#
- 1...Rh8
- 2.Sxf4#
- 1...Bxb2
- 2.Sxc5#
- 1...Bb4
- 2.Bxc4#
- 1...Bd1
- 2.Be4#
- 1...Be2
- 2.Be4#
- 1...Be4
- 2.Bxe4#
- 1...Bg4
- 2.Be4#
- 1...Bxd5
- 2.Qxd5#
- 1...Bh5
- 2.Be4#
- 1...Sf5
- 2.Sxf4#
- 1...fxe3
- 2.Rxe3#
- 1...Rb4
- Tries
- 1.Sd1?
- threat
- 2.Sf2#
- 1...Bxd1
- 2.Be4#
- 1...Bxb2!
- threat
- 1.Sg4?
- threat
- 2.Sf2#
- 2.Se5#
- 1...Bxg4
- 2.Be4#
- 1...Rf5
- 2.Sf2#
- 1...Sg6
- 2.Sf2#
- 1...Bxb2!
- threat
- 1.Bb4?
- threat
- 2.Bxc4#
- 1...Bxd5
- 2.Qxd5#
- 1...fxe3
- 2.Rxe3#
- 1...c3
- 2.Bc4#
- 1...Rxb4!
- threat
- 1.Bxf3?
- threat
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 2.Qd5#
- 2.Qd7#
- 1...Ra6
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 2.Qd5#
- 1...Ra7
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 2.Qd5#
- 1...Rf5
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 1...Rf7
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 2.Qd5#
- 1...Rd8
- 2.Sxf4#
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 1...Sf5
- 2.Sxf4#
- 2.Be2#
- 2.Be4#
- 2.Qe4#
- 1...Sxf3+!
- threat
- 1.Rb4?
- threat
- 2.Sxc5#
- 2.Bxc4#
- 1...Rxb4
- 2.Sxc5#
- 1...Bxb4
- 2.Bxc4#
- 1...Bxd5
- 2.Sxc5#
- 2.Qxd5#
- 1...cxb4
- 2.Sc5#
- 2.Bxc4#
- 1...Ra5
- 2.Bxc4#
- 1...Rc8
- 2.Sxf4#
- 2.Bxc4#
- 1...fxe3!
- threat
- 1.Qb4?
- threat
- 2.Sxc5#
- 1...cxb4
- 2.Sc5#
- 1...Ra5
- 2.Qxc4#
- 1...Rc8
- 2.Sxf4#
- 1...Bxb4!
- threat
- 1.Qh7+?
- 1...Rf5
- 2.Sxf4#
- 1...Be4
- 2.Bxe4#
- 2.Qxe4#
- 1...Sf5
- 2.Sxf4#
- 1...Sg6!
- 1...Rf5
- 1.Sd1?
- Keys
- 1.Ra2!
- threat
- 2.Qb1#
- 1...Rb4
- 2.Sxc5#
- 1...Rb8
- 2.Sxf4#
- 1...Bb2
- 2.Sxc5#
- 1...Bb4
- 2.Bxc4#
- 1...Bd1
- 2.Be4#
- threat
- 1.Ra2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 17
- Sets
- R(d);S_CUTB(a)::S(H),XP(h)
- R(d);N_GUARD::B(G),XP(e)
- R(i);N_GUARD::S(H),XP(f)
- B(a);N_GUARD,XR(B)::S(H),XP(h)
- B(a);S_CUTR(d)::B(G),XP(e)
- B(c);N_GUARD::B(G)
- B(c);N_GUARD::B(G),XB(c)
- B(c);OGATE,XB(G)::QAR2(I),XB(c)
- S(g);S_CUTR(i)::S(H),XP(f)
- P(f);OGATE,XS(F)::R1(A),XP(f)
- Tries
- Try
- S(F);
- Threat
- S(F)
- Vars
- B(c);N_GUARD,XS(F)::B(G)
- Refutation
- B(a);XR(B)
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(c);N_GUARD,XS(F)::B(G)
- R(i);::S(F)
- S(g);::S(F)
- Refutation
- B(a);XR(B)
- Try
- B(E);
- Threat
- B(G),XP(e)
- Vars
- B(c);OGATE,XB(G)::QAR2(I),XB(c)
- P(f);OGATE,XS(F)::R1(A),XP(f)
- P(e);::B(G)
- Refutation
- R(d);XB(E)
- Try
- B(G);XB(c)
- Threat
- DUALS(5)
- Refutation
- S(g);CHECK,XB(G)
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(d);XR(B)::S(H),XP(h)
- B(a);XR(B)::B(G),XP(e)
- R(d);::B(G),XP(e)
- Refutation
- P(f);XS(F)
- Try
- Q(I);
- Threat
- S(H),XP(h)
- Vars
- P(h);XQ(I)::S(H)
- R(d);N_GUARD::QAB1(I),XP(e)
- R(i);N_GUARD::S(H),XP(f)
- Refutation
- B(a);XQ(I)
- Try
- Q(I);CHECK
- Vars
- R(i);P_SPINR(i)::S(H),XP(f)
- S(g);P_SPINS(g)::S(H),XP(f)
- Refutation
- S(g);P_SPINS(g)
- Try
- Actual
- R(B);
- Threat
- QAB(I)
- Vars
- R(d);S_CUTB(a)::S(H),XP(h)
- R(i);N_GUARD::S(H),XP(f)
- B(a);N_GUARD::S(H),XP(h)
- B(a);S_CUTR(d)::B(G),XP(e)
- B(c);N_GUARD::B(G)
Developed and maintained by Brian Stephenson.
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