MESON Chess Problem Database
Problem Display
PID: 206378 (6bK/8/NQ6/3P1R2/r3k1n1/5R2/8/2n5 w - - 0 1)
Gavrilov, Constantin Grigorievich
Revista de Sah, 1925
#2
6 + 5
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.Qb4#
- 1...Ra2
- 2.Qb4#
- 1...Ra3
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rd4
- 2.Sc5#
- 1...Ra5
- 2.Qb4#
- 1...Rxa6
- 2.Qb4#
- 1...Sf2
- 2.Qe3#
- 1...Sh2
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 1...Sf6
- 2.Qe3#
- 1...Sh6
- 2.Qe3#
- 1...Ra1
- Tries
- 1.Qd4+?
- 1...Rxd4
- 2.Sc5#
- 1...Kxd4!
- 1...Rxd4
- 1.Qb1+?
- 1...Sd3
- 2.Qxd3#
- 1...Kd4!
- 1...Sd3
- 1.Qb3?
- threat
- 2.R3f4#
- 2.Qxa4#
- 1...Kd4
- 2.R3f4#
- 2.Qxa4#
- 1...Rxa6
- 2.R3f4#
- 2.Qc4#
- 2.Qb4#
- 1...Bxd5
- 2.R3f4#
- 2.Qxd5#
- 1...Se2
- 2.Qd3#
- 1...Ra1
- 2.R3f4#
- 2.Qc4#
- 2.Qb4#
- 1...Ra2
- 2.R3f4#
- 2.Qc4#
- 2.Qb4#
- 1...Ra3
- 2.R3f4#
- 2.Qc4#
- 2.Qb4#
- 1...Rb4
- 2.R3f4#
- 2.Qxb4#
- 1...Rc4
- 2.R3f4#
- 2.Qxc4#
- 1...Rd4
- 2.Sc5#
- 2.R3f4#
- 1...Ra5
- 2.R3f4#
- 2.Qc4#
- 2.Qb4#
- 1...Sa2
- 2.R3f4#
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se3
- 2.R3f4#
- 2.Qxe3#
- 1...Se5
- 2.R3f4#
- 2.R5f4#
- 1...Sxb3!
- threat
- 1.Qe6+?
- 1...Kd4
- 2.R5f4#
- 1...Se5
- 2.R5f4#
- 2.Qxe5#
- 1...Bxe6!
- 1...Kd4
- 1.Qd4+?
- Keys
- 1.Qb5!
- threat
- 2.Qxa4#
- 1...Kd4
- 2.Qxa4#
- 1...Rxa6
- 2.Qc4#
- 2.Qb4#
- 1...Bxd5
- 2.Qxd5#
- 1...Se2
- 2.Qd3#
- 1...Ra1
- 2.Qc4#
- 2.Qb4#
- 1...Ra2
- 2.Qc4#
- 2.Qb4#
- 1...Ra3
- 2.Qc4#
- 2.Qb4#
- 1...Rb4
- 2.Qxb4#
- 1...Rc4
- 2.Qxc4#
- 1...Rd4
- 2.Sc5#
- 1...Ra5
- 2.Qc4#
- 2.Qb4#
- 1...Sa2
- 2.Qd3#
- 1...Sb3
- 2.Qd3#
- 1...Sd3
- 2.Qxd3#
- 1...Se3
- 2.R3f4#
- 1...Se5
- 2.R5f4#
- threat
- 1.Qb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 8
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD::QAR(E)
- R(b);N_GUARD::QAR(E),XR(b)
- R(b);SBLOCK::S(D)
- R(b);N_GUARD,XS(D)::QAR(E)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- Tries
- Try
- Q(E);CHECK
- Vars
- R(b);SBLOCK,XQ(E)::S(D)
- Refutation
- K(c);P-FLIGHT,XQ(E)
- Try
- Q(E);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(E),XS(a)
- Refutation
- K(c);P-FLIGHT
- Try
- Q(E);
- Threat
- DUALS(2)
- Vars
- S(a);N_GUARD::QAB1(E)
- S(a);N_GUARD::QAB1(E),XS(a)
- Refutation
- S(a);XQ(E)
- Try
- Q(E);CHECK
- Vars
- K(c);P-FLIGHT::R(C)
- Refutation
- B(e);XQ(E)
- Try
- Actual
- Q(E);
- Threat
- QAR(E),XR(b)
- Vars
- K(c);P-FLIGHT::QAR(E),XR(b)
- B(e);OGATE,XP(B)::QAB1(E),XB(e)
- S(a);N_GUARD::QAB1(E)
- R(b);N_GUARD::QAR(E),XR(b)
- R(b);N_GUARD::QAR2(E),XR(b)
- R(b);SBLOCK::S(D)
- S(a);N_GUARD::QAB1(E),XS(a)
- S(d);SBLOCK::R1(A)
- S(d);SBLOCK::R1(C)
Developed and maintained by Brian Stephenson.
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