MESON Chess Problem Database
Problem Display
PID: 225360 (b7/2R1K2p/1p1B2p1/1BNk4/2p1pRnr/1N6/1p6/1Q1nr3 w - - 0 1)
Groeneveld, Cornelis
3rd HM., Praca, 1959
#2
8 + 12
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rf1
- 2.Qxe4#
- 1...Rg1
- 2.Qxe4#
- 1...Reh1
- 2.Qxe4#
- 1...Bc6
- 2.Bxc6#
- 1...Sde3
- 2.Qxe4#
- 1...Sge3
- 2.Qxe4#
- 1...e3
- 2.Bxc4#
- 2.Rd4#
- 2.Qe4#
- 1...bxc5
- 2.Rxc5#
- 1...Rf1
- Tries
- 1.Sa4?
- threat
- 2.Sxb6#
- 2.Bxc4#
- 1...Bc6
- 2.Sxb6#
- 2.Bxc6#
- 1...Sde3
- 2.Sc3#
- 2.Sxb6#
- 2.Qxe4#
- 1...Sge3
- 2.Sxb6#
- 2.Qxe4#
- 1...Se5
- 2.Sxb6#
- 1...c3
- 2.Sxb6#
- 2.Bc4#
- 1...cxb3!
- threat
- 1.Sa6?
- threat
- 2.Sb4#
- 2.Bxc4#
- 1...Bc6
- 2.Sb4#
- 2.Bxc6#
- 1...Sde3
- 2.Sb4#
- 2.Qxe4#
- 1...Sge3
- 2.Sb4#
- 2.Qxe4#
- 1...Se5
- 2.Sb4#
- 1...c3
- 2.Sb4#
- 2.Bc4#
- 1...cxb3!
- threat
- 1.Se6?
- threat
- 2.Bxc4#
- 1...cxb3
- 2.Bc4#
- 1...Bc6
- 2.Bxc6#
- 1...Sde3
- 2.Qxe4#
- 1...Sge3
- 2.Qxe4#
- 1...c3
- 2.Bc4#
- 1...Se5!
- threat
- 1.Sd7?
- threat
- 2.Sxb6#
- 2.Bxc4#
- 1...Se5
- 2.Sxb6#
- 2.Sf6#
- 1...Bc6
- 2.Sxb6#
- 2.Bxc6#
- 1...Sde3
- 2.Sxb6#
- 2.Qxe4#
- 1...Sge3
- 2.Sxb6#
- 2.Sf6#
- 2.Qxe4#
- 1...c3
- 2.Sxb6#
- 2.Bc4#
- 1...cxb3!
- threat
- 1.Rxe4?
- threat
- 2.Bxc4#
- 1...Rxe4+
- 2.Qxe4#
- 1...cxb3
- 2.Bc4#
- 2.Qd3#
- 1...Sde3
- 2.Rd4#
- 1...Sge3
- 2.Re5#
- 1...c3
- 2.Bc4#
- 2.Qd3#
- 1...Se5!
- threat
- 1.Rf5+?
- 1...Se5
- 2.Rxe5#
- 1...gxf5!
- 1...Se5
- 1.Sa4?
- Keys
- 1.Sxe4!
- threat
- 2.Bxc4#
- 1...Rxe4+
- 2.Qxe4#
- 1...cxb3
- 2.Qd3#
- 1...Bc6
- 2.Bxc6#
- 1...Sde3
- 2.Sc3#
- 1...Sge3
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...c3
- 2.Bc4#
- 2.Qd3#
- threat
- 1.Sxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 4
- Sets
- R(b);N_GUARD::QAB1(A),XP(e)
- B(l);N_GUARD::B(D),XB(l)
- S(a);S_CUTR(b)::QAB1(A),XP(e)
- S(f);S_CUTR(b)::QAB1(A),XP(e)
- P(i);OGATE,XS(E)::R1(G),XP(i)
- Tries
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(f);::S(E),XP(i)
- Refutation
- P(d);XS(B)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(f);::S(E)
- Refutation
- P(d);XS(B)
- Try
- S(E);
- Threat
- B(D),XP(d)
- Vars
- P(d);XS(B)::B(D)
- B(l);N_GUARD::B(D),XB(l)
- S(a);S_CUTR(b)::QAB1(A),XP(e)
- S(f);S_CUTR(b)::QAB1(A),XP(e)
- P(d);::B(D)
- Refutation
- S(f);
- Try
- S(E);
- Threat
- DUALS(2)
- Refutation
- P(d);XS(B)
- Try
- R(C);P_SPINR(C),XP(e)
- Threat
- B(D),XP(d)
- Vars
- R(b);CHECK,OGATE,XR(C)::QAB1(A),XR(b)
- S(a);N_PINR(C)::R1(C)
- S(f);N_GUARD,N_PINR(C),S_CUTR(b)::R1(C)
- Refutation
- S(f);N_PINR(C)
- Try
- R(C);CHECK
- Vars
- S(f);N_GUARD,P_SPINS(f)::R1(C),XS(f)
- Refutation
- P(j);XR(C)
- Try
- Actual
- S(E);P_SPINS(E),XP(e)
- Threat
- B(D),XP(d)
- Vars
- R(b);CHECK,OGATE,XS(E)::QAB1(A),XR(b)
- P(d);N_GUARD,XS(B)::QAR2(A)
- B(l);N_GUARD::B(D),XB(l)
- S(a);N_PINS(E)::S(E)
- S(f);N_PINS(E)::S(E)
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).