MESON Chess Problem Database
Problem Display
PID: 150255 (5Q2/1ppK2p1/1P2p3/1R1PNP2/3pk3/1B1N2r1/2PBP1n1/1b3R2 w - - 0 1)
Onkoud, Abdelaziz
1st Prize, Schweizerische Schachzeitung, 2008
#2
13 + 9
| 23 | Die Schwalbe | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Rf3
- 2.exf3#
- 1...Se1
- 2.Rf4#
- 1...Se3
- 2.Rf4#
- 1...Sf4
- 2.Rxf4#
- 1...Sh4
- 2.Rf4#
- 1...exd5
- 2.Bxd5#
- 1...exf5
- 2.Qxf5#
- 1...Rf3
- Tries
- 1.Kxe6?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Sf4+
- 2.Rxf4#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sf2#
- 1...Re3
- 2.Sc5#
- 1...Rf3
- 2.Sc5#
- 2.exf3#
- 1...Se3
- 2.Sc5#
- 2.Rf4#
- 1...c5
- 2.Sf2#
- 2.Sxc5#
- 1...Rg6+!
- threat
- 1.Sf3?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Rxf3
- 2.exf3#
- 1...cxb6
- 2.Sf2#
- 1...c5
- 2.Sf2#
- 2.Sxc5#
- 1...Se3!
- threat
- 1.Sc4?
- threat
- 2.Sf2#
- 1...Rxd3
- 2.exd3#
- 1...c5
- 2.Sd6#
- 1...Rf3
- 2.exf3#
- 1...Se3
- 2.Rf4#
- 1...Re3!
- threat
- 1.Sg4?
- threat
- 2.Sdf2#
- 2.Sc5#
- 2.Sgf2#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sdf2#
- 2.Sgf2#
- 1...Re3
- 2.Sc5#
- 2.Sgf2#
- 1...Rf3
- 2.Sc5#
- 2.exf3#
- 1...Se3
- 2.Sc5#
- 2.Sgf2#
- 2.Rf4#
- 1...c5
- 2.Sdf2#
- 2.Sxc5#
- 2.Sgf2#
- 1...Rxg4!
- threat
- 1.Sc6?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sf2#
- 1...Re3
- 2.Sc5#
- 1...Rf3
- 2.Sc5#
- 2.exf3#
- 1...Se3
- 2.Sc5#
- 2.Rf4#
- 1...bxc6!
- threat
- 1.Sg6?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sf2#
- 1...Rf3
- 2.Sc5#
- 2.exf3#
- 1...c5
- 2.Sf2#
- 2.Sxc5#
- 1...Rxg6!
- threat
- 1.Qf6?
- threat
- 2.Sf2#
- 2.Sc5#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sf2#
- 1...Re3
- 2.Sc5#
- 1...Rf3
- 2.Sc5#
- 2.exf3#
- 1...Se3
- 2.Sc5#
- 2.Rf4#
- 1...c5
- 2.Sf2#
- 2.Sxc5#
- 1...gxf6!
- threat
- 1.dxe6?
- threat
- 2.Sf2#
- 2.Bd5#
- 1...Rxd3
- 2.exd3#
- 1...Re3
- 2.Bd5#
- 1...Rf3
- 2.Bd5#
- 2.exf3#
- 1...Ba2
- 2.Sf2#
- 1...Se3
- 2.Rf4#
- 1...Sf4
- 2.Sf2#
- 2.Rxf4#
- 1...c6
- 2.Sf2#
- 1...c5!
- threat
- 1.fxe6?
- threat
- 2.Qf5#
- 1...Rf3
- 2.Qxf3#
- 2.exf3#
- 1...Rg5
- 2.Qf3#
- 1...Se3
- 2.Rf4#
- 2.Qf4#
- 1...Sf4
- 2.Rxf4#
- 2.Qxf4#
- 1...Sh4
- 2.Rf4#
- 2.Qf4#
- 1...g6!
- threat
- 1.Kxe6?
- Keys
- 1.Sf7!
- threat
- 2.Sc5#
- 1...Rxd3
- 2.exd3#
- 1...cxb6
- 2.Sd6#
- 1...Rf3
- 2.Sg5#
- 1...Sf4
- 2.Rxf4#
- 1...c5
- 2.Sxc5#
- 2.Sd6#
- threat
- 1.Sf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 5
- Sets
- R(c);OGATE::P(D),XR(c)
- S(b);N_GUARD::R1(A)
- S(b);N_GUARD::R1(A),XS(b)
- P(f);OGATE,XP(H)::B(E),XP(f)
- P(f);OGATE,XP(J)::QAB1(M),XP(f)
- Tries
- Try
- K(L);S_FLIGHT,XP(f)
- Threat
- DUALS(2)
- Vars
- S(b);CHECK,N_GUARD::R1(A),XS(b)
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);XP(K)::S(F)
- R(c);::S(F)
- Refutation
- R(c);CHECK
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(I)::P(D),XR(c)
- P(h);XP(K)::S(F)
- Refutation
- S(b);
- Try
- S(I);
- Threat
- S(F)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);N_GUARD::S(I)
- R(c);OGATE::P(D),XR(c)
- S(b);N_GUARD::R1(A)
- Refutation
- R(c);
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- Refutation
- R(c);XS(I)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);XP(K)::S(F)
- R(c);::S(F)
- Refutation
- P(g);XS(I)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);XP(K)::S(F)
- Refutation
- R(c);XS(I)
- Try
- Q(M);
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);XP(K)::S(F)
- R(c);::S(F)
- Refutation
- P(i);XQ(M)
- Try
- P(H);XP(f)
- Threat
- DUALS(2)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- R(c);::B(E)
- B(a);::S(F)
- S(b);N_GUARD::R1(A)
- P(h);::S(F)
- Refutation
- P(h);
- Try
- P(J);XP(f)
- Threat
- QAB1(M)
- Vars
- R(c);N_GUARD::QAB1(M)
- Refutation
- P(i);
- Try
- Actual
- S(I);
- Threat
- S(F)
- Vars
- R(c);OGATE,XS(F)::P(D),XR(c)
- P(h);N_GUARD,XP(K)::S(I)
- R(c);N_GUARD::S(I)
- S(b);N_GUARD::R1(A),XS(b)
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