MESON Chess Problem Database
Problem Display
PID: 79073 (1B6/QK1Rp3/n2N4/1PrppP2/3k1r2/1B2R3/3P1N2/4n3 w - - 0 1)
Onkoud, Abdelaziz
5th Prize, Die Schwalbe, 2007
#2
11 + 8
| 23 | Die Schwalbe | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Rxf5
- 2.Sxf5#
- 1...Sc2
- 2.Rd3#
- 1...Sg2
- 2.Rd3#
- 1...Sd3
- 2.Rxd3#
- 1...Sf3
- 2.Rd3#
- 1...Rxf5
- Tries
- 1.Sde4?
- threat
- 2.Rxd5#
- 1...Sb4
- 2.Qxc5#
- 1...Sc7
- 2.Qxc5#
- 1...e6!
- threat
- 1.Sf7?
- threat
- 2.Bxe5#
- 2.Rxd5#
- 1...Rxf5
- 2.Re4#
- 2.Rxd5#
- 1...Sxb8
- 2.Rxd5#
- 1...Re4
- 2.Rxe4#
- 2.Rxd5#
- 1...Sd3
- 2.Rxd3#
- 2.Rxd5#
- 1...Sf3
- 2.Rd3#
- 2.Rxd5#
- 1...Sb4
- 2.Bxe5#
- 1...e4
- 2.Be5#
- 2.Rxd5#
- 1...e6
- 2.Bxe5#
- 1...Sc7!
- threat
- 1.Sc8?
- threat
- 2.Bxe5#
- 2.Rxd5#
- 1...Rxf5
- 2.Re4#
- 2.Rxd5#
- 1...Sxb8
- 2.Rxd5#
- 1...Re4
- 2.Rxe4#
- 2.Rxd5#
- 1...Sd3
- 2.Rxd3#
- 2.Rxd5#
- 1...Sf3
- 2.Rd3#
- 2.Rxd5#
- 1...Sb4
- 2.Bxe5#
- 1...e4
- 2.Rxd5#
- 1...e6
- 2.Bxe5#
- 1...Sc7!
- threat
- 1.Se8?
- threat
- 2.Bxe5#
- 2.Rxd5#
- 1...Rxf5
- 2.Re4#
- 2.Rxd5#
- 1...Sxb8
- 2.Rxd5#
- 1...Re4
- 2.Rxe4#
- 2.Rxd5#
- 1...Sd3
- 2.Rxd3#
- 2.Rxd5#
- 1...Sf3
- 2.Rd3#
- 2.Rxd5#
- 1...Sb4
- 2.Bxe5#
- 1...e4
- 2.Rxd5#
- 1...e6
- 2.Bxe5#
- 1...Sc7!
- threat
- 1.Re4+?
- 1...dxe4
- 2.Sc4#
- 2.Sdxe4#
- 2.Sf7#
- 2.Sc8#
- 2.Se8#
- 1...Rxe4!
- 1...dxe4
- 1.Sde4?
- Keys
- 1.Sc4!
- threat
- 2.Bxe5#
- 1...Rxf5
- 2.Re4#
- 1...Sxb8
- 2.Qa1#
- 1...Re4
- 2.Rxe4#
- 1...Sd3
- 2.Rxd3#
- 1...Sf3
- 2.Rd3#
- 1...Sc7
- 2.Qa1#
- 1...e4
- 2.Be5#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- R(c);XP(F)::S(G),XR(c)
- S(a);N_GUARD::R1(D)
- S(a);N_GUARD::R1(D),XS(a)
- Tries
- Try
- S(G);P_PINP(e)
- Threat
- R1(J),XP(e)
- Vars
- S(g);N_GUARD::QAB1(H),XR(d)
- Refutation
- P(h);
- Try
- S(G);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- S(g);XB(K)::R1(J),XP(e)
- S(g);::B(K),XP(f)
- P(h);::B(K),XP(f)
- Refutation
- S(g);
- Try
- S(G);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- S(g);XB(K)::R1(J),XP(e)
- S(g);::B(K),XP(f)
- P(f);::R1(J),XP(e)
- P(h);::B(K),XP(f)
- Refutation
- S(g);
- Try
- S(G);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- S(g);XB(K)::R1(J),XP(e)
- S(g);::B(K),XP(f)
- P(f);::R1(J),XP(e)
- P(h);::B(K),XP(f)
- Refutation
- S(g);
- Try
- R(D);CHECK
- Refutation
- R(c);XR(D)
- Try
- Actual
- S(G);P_PINP(e)
- Threat
- B(K),XP(f)
- Vars
- R(c);N_GUARD,XP(F)::R1(D)
- S(g);OGATE,XB(K)::QAB(H)
- R(c);N_GUARD::R1(D),XR(c)
- S(a);N_GUARD::R1(D),XS(a)
- S(a);N_GUARD::R1(D)
- S(g);OGATE::QAB(H)
- P(f);::B(K)
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