MESON Chess Problem Database
Problem Display
PID: 2930 (8/8/1pp2n2/2p1R3/5p2/Bpk3N1/1NPRp3/3bK3 w - - 0 1)
Pirnie, Duncan
Source?, 1911
#2
7 + 9
| 2681 | All Change Here! | 1919 |
| 81 | Chess | 1959 |
SOLUTION
- SOUND
- Sets
- 1...Bxc2
- 2.Sxe2#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Se8
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Re3#
- 1...f3
- 2.Re3#
- 1...c4
- 2.Sa4#
- 1...b5
- 2.Rxc5#
- 1...Bxc2
- Tries
- 1.Rexe2?
- threat
- 2.Rd3#
- 1...Bxe2
- 2.Sxe2#
- 1...c4
- 2.Sxd1#
- 2.Sa4#
- 1...Bxc2!
- threat
- 1.Re4?
- threat
- 2.Sa4#
- 2.Rc4#
- 1...Sxe4
- 2.Sxe4#
- 1...bxc2
- 2.Rd3#
- 1...c4
- 2.Sa4#
- 2.Rxc4#
- 1...b5!
- threat
- 1.Red5?
- threat
- 2.R5d3#
- 1...Bxc2
- 2.Sxe2#
- 1...Sxd5
- 2.Se4#
- 1...c4
- 2.Sa4#
- 1...cxd5!
- threat
- 1.Rg5?
- 1...Bxc2
- 2.Sxe2#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Rxg3#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Se8
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...c4
- 2.Sa4#
- 1...b5
- 2.Rxc5#
- 1...f3!
- 1...Bxc2
- 1.Re6?
- 1...Bxc2
- 2.Sxe2#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Re3#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Se8
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...f3
- 2.Re3#
- 1...c4
- 2.Sa4#
- 1...b5!
- 1...Bxc2
- 1.Re7?
- 1...Bxc2
- 2.Sxe2#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Re3#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Se8
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...f3
- 2.Re3#
- 1...c4
- 2.Sa4#
- 1...b5!
- 1...Bxc2
- 1.Re8?
- 1...Bxc2
- 2.Sxe2#
- 1...Sxe8
- 2.Se4#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Re3#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...f3
- 2.Re3#
- 1...c4
- 2.Sa4#
- 1...b5!
- 1...Bxc2
- 1.Rexe2?
- Keys
- 1.Rf5!
- 1...Bxc2
- 2.Sxe2#
- 1...bxc2
- 2.Rd3#
- 1...fxg3
- 2.Rf3#
- 1...Se4
- 2.Sxe4#
- 1...Sg4
- 2.Se4#
- 1...Sd5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sd7
- 2.Se4#
- 1...Sh7
- 2.Se4#
- 1...Se8
- 2.Se4#
- 1...Sg8
- 2.Se4#
- 1...f3
- 2.Rxf3#
- 1...c4
- 2.Sa4#
- 1...b5
- 2.Rxc5#
- 1...Bxc2
- 1.Rf5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);N_GUARD,XS(F)::R(G)
- P(e);N_GUARD::R(G)
- P(f);SBLOCK::S(B)
- P(g);N_GUARD::R(G),XP(f)
- Tries
- Try
- R(G);XP(b)
- Threat
- R1(D)
- Vars
- B(a);XR(G)::S(F),XB(a)
- Refutation
- B(a);XP(C)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- S(i);XR(G)::S(F),XS(i)
- P(c);SBLOCK,XP(C)::R1(D)
- Refutation
- P(g);
- Try
- R(G);
- Threat
- R1(G)
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- S(i);N_GUARD,XR(G)::S(F)
- P(f);SBLOCK::S(B)
- Refutation
- P(h);XR(G)
- Try
- R(G);
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);OGATE,XS(F)::R(G),XP(e)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(f);SBLOCK::S(B)
- P(g);N_GUARD::R(G),XP(f)
- Refutation
- P(e);
- Try
- R(G);
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);N_GUARD,XS(F)::R(G)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::R(G)
- P(f);SBLOCK::S(B)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);N_GUARD,XS(F)::R(G)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::R(G)
- P(f);SBLOCK::S(B)
- Refutation
- P(g);
- Try
- R(G);
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- S(i);N_GUARD,XR(G)::S(F)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);N_GUARD,XS(F)::R(G)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);N_GUARD::R(G)
- P(f);SBLOCK::S(B)
- Refutation
- P(g);
- Try
- Actual
- R(G);
- Vars
- B(a);N_GUARD,XP(C)::S(F),XP(b)
- P(c);SBLOCK,XP(C)::R1(D)
- P(e);OGATE,XS(F)::R(G)
- S(i);N_GUARD::S(F),XS(i)
- S(i);N_GUARD::S(F)
- P(e);OGATE::R(G),XP(e)
- P(f);SBLOCK::S(B)
- P(g);N_GUARD::R(G),XP(f)
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