MESON Chess Problem Database
Problem Display
PID: 103643 (8/p1K2p2/2n2B2/r5R1/2pppk1P/2N1p2Q/q3n2P/4N1r1 w - - 0 1)
Lukyanov, Valentin Volodimirovich
Shakh, 1982
#2
8 + 12
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Sxe2#
- 1...Qb3
- 2.Sxe2#
- 1...Qa1
- 2.Sxe2#
- 1...Qa3
- 2.Sxe2#
- 1...Qa4
- 2.Sxe2#
- 1...Rxe1
- 2.Qg4#
- 1...Rf1
- 2.Sg2#
- 2.Qxf1#
- 2.Qg4#
- 1...Rh1
- 2.Sg2#
- 2.Qg4#
- 1...Rg2
- 2.Sxg2#
- 1...Rg4
- 2.Qf1#
- 2.Qxg4#
- 1...Ra3
- 2.Sd5#
- 2.Rf5#
- 2.Qf5#
- 1...Ra4
- 2.Sd5#
- 2.Rf5#
- 2.Qf5#
- 1...Rd5
- 2.Sxd5#
- 1...Rf5
- 2.Rxf5#
- 2.Qxf5#
- 1...Ra6
- 2.Sd5#
- 2.Rf5#
- 2.Qf5#
- 1...Sg3
- 2.Qg4#
- 1...Se5
- 2.Rf5#
- 2.Qf5#
- 1...Qb1
- Tries
- 1.Sxe4?
- threat
- 2.Qf3#
- 1...Kxe4
- 2.Qf3#
- 1...Rxe1
- 2.Qg4#
- 1...Rf1
- 2.Qg4#
- 1...Sg3
- 2.Qg4#
- 1...Se5
- 2.Qf5#
- 1...Rg3!
- threat
- 1.Be5+?
- 1...Sxe5
- 2.Rf5#
- 2.Qf5#
- 1...Rxe5!
- 1...Sxe5
- 1.Rxg1?
- threat
- 2.Sg2#
- 2.Rf1#
- 2.Qf1#
- 2.Qg4#
- 1...Sxc3
- 2.Qg4#
- 1...Rg5
- 2.Rf1#
- 2.Qf1#
- 1...Sc1
- 2.Qg4#
- 1...Sg3
- 2.hxg3#
- 1...Se5
- 2.Sg2#
- 2.Bg5#
- 1...Sxg1!
- threat
- 1.Rg2?
- threat
- 2.Qg4#
- 1...Rxg2
- 2.Sxg2#
- 1...Sg3
- 2.hxg3#
- 1...Se5
- 2.Bg5#
- 1...Rg5!
- threat
- 1.Rg4+?
- 1...Rxg4
- 2.Qf1#
- 1...Kf5!
- 1...Rxg4
- 1.Rxa5?
- threat
- 2.Sd5#
- 2.Rf5#
- 2.Qf5#
- 1...Sxc3
- 2.Rf5#
- 2.Qf5#
- 1...Sxa5
- 2.Sd5#
- 1...dxc3
- 2.Rf5#
- 2.Qf5#
- 1...Rg4
- 2.Qf1#
- 1...Rg5
- 2.Bxg5#
- 1...Sg3
- 2.Sd5#
- 2.Bg5#
- 1...Sb4
- 2.Be5#
- 2.Rf5#
- 2.Qf5#
- 1...Se5
- 2.Sd5#
- 2.Bxe5#
- 1...Se7
- 2.Be5#
- 1...Qxa5+!
- threat
- 1.Rb5?
- threat
- 2.Sd5#
- 2.Qf5#
- 1...Sxc3
- 2.Qf5#
- 1...dxc3
- 2.Qf5#
- 1...Rg4
- 2.Qf1#
- 1...Rg5
- 2.Bxg5#
- 1...Sg3
- 2.Sd5#
- 2.Bg5#
- 1...Sb4
- 2.Be5#
- 2.Qf5#
- 1...Se5
- 2.Sd5#
- 2.Bxe5#
- 1...Se7
- 2.Be5#
- 1...Rxb5!
- threat
- 1.Rc5?
- threat
- 2.Sd5#
- 2.Qf5#
- 1...Sxc3
- 2.Qf5#
- 1...dxc3
- 2.Qf5#
- 1...Rg4
- 2.Qf1#
- 1...Rg5
- 2.Bxg5#
- 1...Sg3
- 2.Sd5#
- 2.Bg5#
- 1...Sb4
- 2.Be5#
- 2.Qf5#
- 1...Se5
- 2.Sd5#
- 2.Bxe5#
- 1...Se7
- 2.Be5#
- 1...Rxc5!
- threat
- 1.Sxe4?
- Keys
- 1.Rd5!
- threat
- 2.Qf5#
- 1...Rxd5
- 2.Sxd5#
- 1...Rg4
- 2.Qf1#
- 1...Rg5
- 2.Bxg5#
- 1...Sg3
- 2.Bg5#
- 1...Se5
- 2.Bxe5#
- 1...Se7
- 2.Be5#
- threat
- 1.Rd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 7
- Sets
- Q(b);N_GUARD::S(C),XS(c)
- R(a);N_GUARD,XS(A)::QAR1(D)
- R(a);N_GUARD::S(A),XR(a)
- R(i);N_GUARD::S(C),XR(i)
- S(c);S_CUTR(a)::QAR1(D)
- Tries
- Try
- S(C);XP(g)
- Threat
- QAR1(D)
- Vars
- K(h);P-FLIGHT,XS(C)::QAB1(D)
- R(a);N_GUARD,XS(A)::QAR1(D)
- R(a);N_GUARD::QAR1(D)
- S(c);S_CUTR(a)::QAR1(D)
- S(j);S_CUTR(i)::QAR1(D)
- Refutation
- R(a);
- Try
- B(G);CHECK
- Refutation
- R(i);XB(G)
- Try
- R(F);XR(a)
- Threat
- DUALS(4)
- Vars
- S(c);XS(C)::QAR1(D)
- S(c);::QAR1(D)
- S(c);OGATE::P(B),XS(c)
- Refutation
- S(c);XR(F)
- Try
- R(F);
- Threat
- QAR1(D)
- Vars
- R(a);XR(F)::S(A),XR(a)
- S(c);OGATE::P(B),XS(c)
- S(j);SBLOCK,S_CUTR(i)::B(G)
- Refutation
- R(i);
- Try
- R(F);CHECK
- Vars
- R(a);SBLOCK,XR(F)::QAR(D)
- Refutation
- K(h);P-FLIGHT
- Try
- R(F);XR(i)
- Threat
- DUALS(3)
- Vars
- S(j);XR(F)::S(C)
- R(a);N_GUARD,SBLOCK::QAR(D)
- R(a);N_GUARD::B(G),XR(a)
- S(j);N_GUARD::B(G)
- Refutation
- Q(b);CHECK,XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- S(c);XS(C)::QAR1(D)
- P(f);XS(C)::QAR1(D)
- R(a);N_GUARD,SBLOCK::QAR(D)
- R(a);N_GUARD::B(G),XR(a)
- S(j);N_GUARD::B(G)
- Refutation
- R(i);XR(F)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- S(c);XS(C)::QAR1(D)
- P(f);XS(C)::QAR1(D)
- R(a);N_GUARD,SBLOCK::QAR(D)
- R(a);N_GUARD::B(G),XR(a)
- S(j);N_GUARD::B(G)
- Refutation
- R(i);XR(F)
- Try
- Actual
- R(F);
- Threat
- QAR1(D)
- Vars
- R(i);XR(F)::S(C),XR(i)
- R(a);N_GUARD,SBLOCK::QAR(D)
- R(a);N_GUARD::B(G),XR(a)
- S(c);S_CUTR(a)::B(G)
- S(j);N_GUARD::B(G),XS(j)
- S(j);N_GUARD::B(G)
Developed and maintained by Brian Stephenson.
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