MESON Chess Problem Database
Problem Display
PID: 103646 (8/4n3/3r3r/QpNR1B2/2k5/1N6/8/KR6 w - - 0 1)
Lukyanov, Valentin Volodimirovich
Suomen Shakki, 1977
#2
7 + 5
| 5454 | Near Snap | 2009 |
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxd5
- 2.Rc1#
- 1...Ra6
- 2.Rd4#
- 1...Rb6
- 2.Rd4#
- 1...Rc6
- 2.Rd4#
- 1...Rde6
- 2.Rd4#
- 1...Rdf6
- 2.Rd4#
- 1...Rdg6
- 2.Rd4#
- 1...Sxd5
- 2.Bd3#
- 1...Rxd5
- Tries
- 1.Sd3?
- threat
- 2.Rc5#
- 1...Kxd5
- 2.Qxb5#
- 1...Rxd5
- 2.Qb4#
- 1...Sxd5
- 2.Se5#
- 1...Rc6
- 2.Rd4#
- 1...Sxf5!
- threat
- 1.Sa4?
- threat
- 2.Rc5#
- 2.Qxb5#
- 1...Kxd5
- 2.Qxb5#
- 1...Rxd5
- 2.Qc3#
- 1...Sxf5
- 2.Qxb5#
- 1...bxa4
- 2.Sd2#
- 2.Bd3#
- 2.Rc5#
- 2.Qc5#
- 1...Rb6
- 2.Rd4#
- 2.Rc5#
- 1...Rc6
- 2.Rd4#
- 2.Qxb5#
- 1...b4
- 2.Sd2#
- 2.Bd3#
- 2.Rc5#
- 2.Qb5#
- 2.Qc5#
- 1...Sxd5!
- threat
- 1.Be4?
- threat
- 2.Sd2#
- 2.Rc1#
- 1...Rxd5
- 2.Rc1#
- 1...Sxd5
- 2.Bd3#
- 1...b4
- 2.Rc1#
- 1...Rh1
- 2.Sd2#
- 1...Rh3
- 2.Sd2#
- 1...Rh2!
- threat
- 1.Be6?
- threat
- 2.Sd2#
- 2.Rc1#
- 2.Rd4#
- 1...Rxd5
- 2.Rc1#
- 1...Rdxe6
- 2.Rd4#
- 1...Sxd5
- 2.Rc1#
- 1...b4
- 2.Rc1#
- 1...Rh1
- 2.Sd2#
- 2.Rd4#
- 1...Rh2
- 2.Rd4#
- 1...Rh3
- 2.Sd2#
- 2.Rd4#
- 1...Rhxe6!
- threat
- 1.Rd3?
- threat
- 2.Rc1#
- 2.Qc3#
- 1...Rd4
- 2.Rxd4#
- 1...Ra6
- 2.Rc1#
- 2.Rd4#
- 1...Rh1
- 2.Qc3#
- 1...Rh2
- 2.Qc3#
- 1...Sd5
- 2.Rd4#
- 1...b4
- 2.Sd2#
- 2.Rc1#
- 1...Rxd3!
- threat
- 1.Rxd6?
- threat
- 2.Bd3#
- 2.Rc1#
- 2.Rd4#
- 1...Sxf5
- 2.Rc1#
- 1...b4
- 2.Rc1#
- 1...Rh1
- 2.Bd3#
- 2.Rd4#
- 1...Rh2
- 2.Bd3#
- 2.Rd4#
- 1...Rh3
- 2.Rd4#
- 1...Rh4
- 2.Bd3#
- 2.Rc1#
- 1...Sd5
- 2.Bd3#
- 1...Sc6
- 2.Bd3#
- 2.Rc1#
- 1...Rxd6!
- threat
- 1.Qd2?
- threat
- 2.Sa5#
- 2.Rc1#
- 2.Qd4#
- 1...Rxd5
- 2.Rc1#
- 1...Sxd5
- 2.Bd3#
- 2.Qd4#
- 1...Sxf5
- 2.Sa5#
- 2.Rc1#
- 1...b4
- 2.Qd3#
- 1...Rh1
- 2.Sa5#
- 2.Qd4#
- 1...Rh3
- 2.Sa5#
- 2.Qd4#
- 1...Rh4
- 2.Sa5#
- 2.Rc1#
- 1...Sc6
- 2.Rc1#
- 1...Ra6+!
- threat
- 1.Qc3+?
- 1...Kxd5
- 2.Be4#
- 1...Kxc3!
- 1...Kxd5
- 1.Qb4+?
- 1...Kxd5
- 2.Qe4#
- 1...Kxb4!
- 1...Kxd5
- 1.Qxb5+?
- 1...Kc3
- 2.Sa4#
- 2.Rc1#
- 1...Kxd5
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Kxb5!
- 1...Kc3
- 1.Sd3?
- Keys
- 1.Se4!
- threat
- 2.Qxb5#
- 1...Kxd5
- 2.Qxb5#
- 1...Rxd5
- 2.Qc3#
- 1...Sxd5
- 2.Sed2#
- 1...Ra6
- 2.Rd4#
- 1...Rb6
- 2.Rd4#
- 1...b4
- 2.Sbd2#
- 2.Qb5#
- 2.Qc5#
- threat
- 1.Se4!
Anticipated by 17964(1952)
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 1
- REMOVED MATES = 4
- Sets
- R(c);SBLOCK,XR(F)::R(B)
- R(c);N_GUARD,P_PINQ(D)::R1(F)
- R(c);N_GUARD::R1(F)
- S(e);SBLOCK,XR(F)::B(G)
- Tries
- Try
- S(E);
- Threat
- R1(F)
- Vars
- K(a);P_SPINP(b),S_FLIGHT,XR(F)::QAR2(D),XP(b)
- R(c);SBLOCK,XR(F)::QAR1(D)
- S(e);SBLOCK,XR(F)::S(E)
- R(c);N_GUARD::R1(F)
- Refutation
- S(e);XB(G)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- K(a);P_SPINP(b),S_FLIGHT,XR(F)::QAR2(D),XP(b)
- R(c);SBLOCK,XR(F)::QAR1(D)
- S(e);XB(G)::QAB1(D),XP(b)
- Refutation
- S(e);XR(F)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(c);XR(F)::R(B)
- S(e);SBLOCK,XR(F)::B(G)
- P(b);::R(B)
- R(d);P_PINR(B)::S(C)
- R(d);::S(C)
- Refutation
- R(d);
- Try
- B(G);
- Threat
- DUALS(3)
- Vars
- R(c);P_SPINR(c),XR(F)::R(B)
- R(c);XB(G)::R1(F)
- S(e);P_SPINS(e),XR(F)::R(B)
- P(b);::R(B)
- R(d);::B(G)+R(F),DCHECK
- Refutation
- R(d);XB(G)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- R(c);N_GUARD::R1(F),XR(c)
- R(d);P_PINR(B)::QAR1(D)
- R(d);::QAR1(D)
- S(e);S_CUTR(c)::R1(F)
- Refutation
- R(c);XR(F)
- Try
- R(F);XR(c)
- Threat
- DUALS(3)
- Vars
- S(e);XB(G)::R(B)
- P(b);::R(B)
- R(d);::R1(F)
- S(e);::B(G)
- Refutation
- R(d);XR(F)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- R(c);XR(F)::R(B)
- P(b);SBLOCK::QAB1(D)
- S(e);::R(B)
- Refutation
- R(c);CHECK
- Try
- Q(D);CHECK
- Vars
- K(a);S_FLIGHT,XR(F)::B(G)
- Refutation
- K(a);P-FLIGHT,XQ(D)
- Try
- Q(D);CHECK
- Vars
- K(a);OGATE,S_FLIGHT,XR(F)::QAB1(D)
- Refutation
- K(a);P-FLIGHT,XQ(D)
- Try
- Q(D);CHECK,XP(b)
- Refutation
- K(a);S_FLIGHT,XQ(D)
- Try
- Actual
- S(E);
- Threat
- QAB1(D),XP(b)
- Vars
- K(a);P_SPINP(b),S_FLIGHT,XR(F)::QAR2(D),XP(b)
- R(c);SBLOCK,XR(F)::QAR1(D)
- S(e);SBLOCK,XR(F)::S(E)
- R(c);N_GUARD,P_PINQ(D)::R1(F)
- R(c);N_GUARD::R1(F)
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