MESON Chess Problem Database
Problem Display
PID: 162285 (2K5/PpR1Qpp1/N7/1P1k3N/p5P1/1P2B1Rp/1p2P1q1/1nr1br1B w - - 0 1)
Aleksandrov, Rostislav Nikolaevich
64 Shakhmatnoe obozrenie, 1928
#2
13 + 12
| 15148 | Sadier Collection | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Qf3
- 2.Sf4#
- 1...Qe4
- 2.Bxe4#
- 1...Rd1
- 2.Rc5#
- 2.Rd7#
- 1...Rc3
- 2.Sb4#
- 1...Rc4
- 2.bxc4#
- 1...Rc5
- 2.Rxc5#
- 1...Rxc7+
- 2.Sxc7#
- 1...Rg1
- 2.Sf4#
- 1...Rxh1
- 2.Sf4#
- 1...Rf4
- 2.Sxf4#
- 1...Bf2
- 2.Sf4#
- 2.Sb4#
- 1...Bc3
- 2.Rc5#
- 2.Rd7#
- 1...Bxg3
- 2.Sb4#
- 1...Bb4
- 2.Sxb4#
- 1...Sd2
- 2.Sb4#
- 1...Sc3
- 2.Sb4#
- 2.Rc5#
- 2.Rd7#
- 1...Qf3
- Tries
- 1.Bxg2+?
- 1...Rf3
- 2.Sf4#
- 2.Bxf3#
- 1...hxg2!
- 1...Rf3
- 1.Bxc1?
- threat
- 2.Rd3#
- 2.Rd7#
- 1...Kd4
- 2.Rd3#
- 1...bxc1Q
- 2.Rd3#
- 1...bxc1S
- 2.Rd7#
- 1...bxc1R
- 2.Rd3#
- 1...axb3
- 2.Rd3#
- 1...Qf3
- 2.Rd7#
- 1...Rf3
- 2.Rd7#
- 1...Rf4
- 2.Rd7#
- 1...Rf6
- 2.Rd3#
- 1...Bf2
- 2.Rd7#
- 1...Bc3
- 2.Rd7#
- 1...Bb4
- 2.Rd3#
- 1...Bxg3!
- threat
- 1.Bg1?
- threat
- 2.Rd3#
- 1...Rxc7+
- 2.Sxc7#
- 1...Bxg3
- 2.Sb4#
- 1...Qf3
- 2.Sf4#
- 1...Rd1
- 2.Rc5#
- 2.Rd7#
- 1...Rc3
- 2.Sb4#
- 1...Rc4
- 2.bxc4#
- 1...Rf3
- 2.e4#
- 1...Rf4
- 2.Sxf4#
- 1...Bc3
- 2.Rc5#
- 2.Rd7#
- 1...Bf2!
- threat
- 1.Bf2?
- threat
- 2.Sf4#
- 2.Rd3#
- 1...Rxc7+
- 2.Sxc7#
- 1...Rxf2
- 2.Rd3#
- 1...Qf3
- 2.Sf4#
- 2.Bxf3#
- 1...Rd1
- 2.Sf4#
- 2.Rc5#
- 2.Rd7#
- 1...Rc3
- 2.Sf4#
- 2.Sb4#
- 1...Rc4
- 2.bxc4#
- 1...Bd2
- 2.Rd3#
- 1...Bc3
- 2.Sf4#
- 2.Rc5#
- 2.Rd7#
- 1...g5
- 2.Sf6#
- 2.Rd3#
- 1...Bxf2!
- threat
- 1.Bc5?
- threat
- 2.Rd3#
- 2.Rd7#
- 1...Rxc5
- 2.Rd3#
- 1...Bxg3
- 2.Sb4#
- 1...Qf3
- 2.Sf4#
- 2.Rd7#
- 1...Rd1
- 2.Rd7#
- 1...Rc3
- 2.Sb4#
- 2.Rd7#
- 1...Rc4
- 2.Rd7#
- 1...Rf3
- 2.Rd7#
- 2.e4#
- 1...Rf4
- 2.Sxf4#
- 2.Rd7#
- 1...Rf6
- 2.Rd3#
- 1...Bf2
- 2.Sf4#
- 2.Sb4#
- 2.Rd7#
- 1...Bc3
- 2.Rd7#
- 1...axb3!
- threat
- 1.Rf3?
- threat
- 2.Sf4#
- 1...Qxg4+
- 2.Rf5#
- 1...Rxc7+
- 2.Sxc7#
- 1...Qh2
- 2.Rf5#
- 1...Qg3
- 2.Rf5#
- 1...Rc4
- 2.bxc4#
- 1...Bg3
- 2.Sb4#
- 1...g5
- 2.Sf6#
- 1...Rxf3!
- threat
- 1.Rc3?
- threat
- 2.Sb4#
- 2.Sc7#
- 1...Bxc3
- 2.Sc7#
- 1...Bxg3
- 2.Sb4#
- 1...bxa6
- 2.a8Q#
- 2.a8B#
- 1...Rf4
- 2.Sxf4#
- 2.Sc7#
- 1...Rxc3+!
- threat
- 1.Qc5+?
- 1...Ke4
- 2.Re7#
- 2.Qd4#
- 1...Ke6
- 2.Re7#
- 1...Rxc5!
- 1...Ke4
- 1.Qd6+?
- 1...Ke4
- 2.Qd4#
- 1...Kxd6!
- 1...Ke4
- 1.Qd7+?
- 1...Ke4
- 2.Qd4#
- 1...Ke5!
- 1...Ke4
- 1.Bxg2+?
- Keys
- 1.Bb6!
- threat
- 2.Rd3#
- 1...Rxc7+
- 2.Sxc7#
- 1...Bxg3
- 2.Sb4#
- 1...Qf3
- 2.Sf4#
- 1...Rd1
- 2.Rd7#
- 1...Rc3
- 2.Sb4#
- 1...Rc4
- 2.bxc4#
- 1...Rf3
- 2.e4#
- 1...Rf4
- 2.Sxf4#
- 1...Bf2
- 2.Sf4#
- 2.Sb4#
- 1...Bc3
- 2.Rd7#
- threat
- 1.Bb6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(f);S_CUTR(d)::S(H)
- Q(f);OGATE::B(A),XQ(f)
- R(b);S_CUTB(c)::S(I)
- R(b);OGATE::P(C),XR(b)
- R(b);N_GUARD::R1(K),XR(b)
- R(b);CHECK,XR(K)::S(I),XR(b)
- R(d);N_GUARD::S(H)
- R(d);N_GUARD,N_SPINQ(f),XB(A)::S(H)
- R(d);N_GUARD::S(H),XR(d)
- B(c);N_GUARD,XR(E)::S(I)
- B(c);N_GUARD::S(I),XB(c)
- S(a);S_CUTB(c)::S(I)
- Tries
- Try
- B(A);CHECK,XQ(f)
- Refutation
- P(g);XB(A)
- Try
- B(D);N_SPINR(K),XR(b)
- Threat
- DUALS(2)
- Vars
- K(i);N_SPINQ(f),P-FLIGHT::R1(E)
- P(e);P_PINR(K),XB(D)::R(E)
- P(e);XB(D)::R(K)
- P(h);XP(C)::R(E)
- Q(f);::R(K)
- R(d);N_SPINQ(f)::R(K)
- R(d);::R(K)
- R(d);::R(E)
- B(c);::R(K)
- B(c);::R(E)
- Refutation
- B(c);XR(E)
- Try
- B(D);
- Threat
- R(E)
- Vars
- R(b);CHECK,XR(K)::S(I),XR(b)
- B(c);N_GUARD,XR(E)::S(I)
- Q(f);S_CUTR(d)::S(H)
- R(b);S_CUTB(c)::S(I)
- R(b);OGATE::P(C),XR(b)
- R(d);N_SPINQ(f),S_CUTQ(f)::P(B)
- R(d);N_GUARD::S(H),XR(d)
- Refutation
- B(c);
- Try
- B(D);
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,XR(K)::S(I),XR(b)
- R(d);XB(D)::R(E)
- R(b);OGATE::P(C),XR(b)
- B(c);::R(E)
- Refutation
- B(c);XB(D)
- Try
- B(D);N_SPINR(K)
- Threat
- DUALS(2)
- Vars
- R(b);P_PINR(K),XB(D)::R(E)
- B(c);N_GUARD,XR(E)::S(I)
- R(b);::R(K)
- R(d);::R(E)
- B(c);::R(K)
- Refutation
- P(h);XP(C)
- Try
- R(E);N_PINQ(f)
- Threat
- S(H)
- Vars
- Q(f);CHECK,XP(F)::B(A)+R(E),DCHECK
- R(b);CHECK,XR(K)::S(I),XR(b)
- Q(f);::B(A)+R(E),DCHECK
- R(b);OGATE::P(C),XR(b)
- B(c);N_GUARD::S(I)
- P(l);N_GUARD::S(H)
- Refutation
- R(d);XR(E)
- Try
- R(K);
- Threat
- DUALS(2)
- Vars
- B(c);XR(K)::S(I)
- B(c);XR(E)::S(I)
- P(j);XS(I)::P=Q
- Refutation
- R(b);CHECK,XR(K)
- Try
- Q(L);CHECK,N_SPINR(K)
- Vars
- K(i);N_SPINQ(f),S_FLIGHT::R1(K)
- Refutation
- R(b);P_PINR(K),XQ(L)
- Try
- Q(L);CHECK
- Vars
- K(i);OGATE,S_FLIGHT::QAR1(L)
- Refutation
- K(i);N_SPINQ(f),P-FLIGHT,XQ(L)
- Try
- Q(L);CHECK
- Vars
- K(i);OGATE,S_FLIGHT::QAR1(L)
- Refutation
- K(i);N_SPINQ(f),P-FLIGHT
- Try
- Actual
- B(D);
- Threat
- R(E)
- Vars
- R(b);CHECK,XR(K)::S(I),XR(b)
- B(c);N_GUARD,XR(E)::S(I)
- Q(f);S_CUTR(d)::S(H)
- R(b);N_PINR(K)::R(K)
- R(b);S_CUTB(c)::S(I)
- R(b);OGATE::P(C),XR(b)
- R(d);N_SPINQ(f),S_CUTQ(f)::P(B)
- R(d);N_GUARD::S(H),XR(d)
- B(c);N_PINR(K)::R(K)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).