MESON Chess Problem Database
Problem Display
PID: 251836 (5N1K/q1B2RPn/1pBp1n1N/p3P3/4rk1P/3R4/3P1p1P/1Q2b1r1 w - - 0 1)
Ellerman, Arnoldo
2nd Prize, Schakend Nederland, 1961
#2
13 + 11
| 15601 | Albrecht-Leiss-Degener Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kxe5
- 2.Bxd6#
- 1...Rf1
- 2.Sg6#
- 1...Rh1
- 2.Sg6#
- 1...Rg6
- 2.Sxg6#
- 1...Rxe5
- 2.Rf3#
- 1...Sg5
- 2.Sg6#
- 1...dxe5
- 2.Se6#
- 1...d5
- 2.Se6#
- 1...Kxe5
- Tries
- 1.Ra3?
- threat
- 2.Qxe4#
- 1...Rxe5
- 2.Rf3#
- 1...Re2
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Ra4
- 2.Qf5#
- 1...Rb4
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Rd4
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 1...Kxe5!
- threat
- 1.Rb3?
- threat
- 2.Qxe4#
- 1...Rxe5
- 2.Rf3#
- 1...Re2
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Ra4
- 2.Qf5#
- 1...Rb4
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Rd4
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 1...Kxe5!
- threat
- 1.Rc3?
- threat
- 2.Qxe4#
- 1...Rxe5
- 2.Rf3#
- 1...Re2
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Ra4
- 2.Qf5#
- 1...Rb4
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Rd4
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 1...Kxe5!
- threat
- 1.Re3?
- threat
- 2.Qxe4#
- 1...Rxe3
- 2.Qf5#
- 1...Rxe5
- 2.Rf3#
- 1...Ra4
- 2.Se6#
- 2.Qf5#
- 1...Rb4
- 2.Se6#
- 2.Qf5#
- 1...Rc4
- 2.Se6#
- 2.Qf5#
- 1...Rd4
- 2.Se6#
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 1...Kxe5!
- threat
- 1.Rf3+?
- 1...Kxf3
- 2.Qxe4#
- 1...Kxe5!
- 1...Kxf3
- 1.Rg3?
- threat
- 2.Sg6#
- 2.Qxe4#
- 1...Rxg3
- 2.Qxe4#
- 1...Rxe5
- 2.Sg6#
- 2.Rf3#
- 1...Sxf8
- 2.Qxe4#
- 1...Qb8
- 2.Qxe4#
- 1...Qa8
- 2.Qxe4#
- 1...Re2
- 2.Sg6#
- 2.Qf5#
- 1...Re3
- 2.Sg6#
- 2.Qf5#
- 1...Ra4
- 2.Sg6#
- 2.Qf5#
- 1...Rb4
- 2.Sg6#
- 2.Qf5#
- 1...Rc4
- 2.Sg6#
- 2.Qf5#
- 1...Rd4
- 2.Sg6#
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 2.Sg6#
- 1...Kxe5!
- threat
- 1.Rh3?
- threat
- 2.Qxe4#
- 1...Rxe5
- 2.Rf3#
- 1...Re2
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Ra4
- 2.Qf5#
- 1...Rb4
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Rd4
- 2.Qf5#
- 1...Sg5
- 2.Sg6#
- 1...d5
- 2.Se6#
- 1...Kxe5!
- threat
- 1.Rxf6+?
- 1...Kxe5
- 2.Sd7#
- 2.Rf5#
- 1...Sxf6!
- 1...Kxe5
- 1.Ra3?
- Keys
- 1.Rxd6!
- threat
- 2.Qxe4#
- 1...Kf3
- 2.Qxe4#
- 1...Kxe5
- 2.Rd5#
- 1...Rxe5
- 2.Rd4#
- 1...Re2
- 2.Qf5#
- 1...Re3
- 2.Qf5#
- 1...Ra4
- 2.Qf5#
- 1...Rb4
- 2.Qf5#
- 1...Rc4
- 2.Qf5#
- 1...Rd4
- 2.Rxd4#
- 2.Qf5#
- 1...Sg5
- 2.Rdxf6#
- threat
- 1.Rxd6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 6
- REMOVED MATES = 5
- Sets
- K(e);N_SPINS(i),OGATEB,P_SPINP(h),S_FLIGHT,XP(F)::B(I),XP(h)
- R(b);N_GUARD::S(L)
- R(b);N_GUARD::S(L),XR(b)
- R(d);SBLOCK,XP(F)::R1(D)
- S(k);S_CUTR(b)::S(L)
- P(h);P_SPINP(h),XP(F)::S(L)
- P(h);::S(L)
- Tries
- Try
- R(D);
- Threat
- QAR1(A),XR(d)
- Vars
- R(d);SBLOCK,XP(F)::R1(D)
- R(d);OGATE::QAR1(A)
- S(k);S_CUTR(b)::S(L)
- P(h);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(D);
- Threat
- QAR1(A),XR(d)
- Vars
- R(d);SBLOCK,XP(F)::R1(D)
- R(d);OGATE::QAR1(A)
- S(k);S_CUTR(b)::S(L)
- P(h);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(D);
- Threat
- QAR1(A),XR(d)
- Vars
- R(d);SBLOCK,XP(F)::R1(D)
- R(d);OGATE::QAR1(A)
- S(k);S_CUTR(b)::S(L)
- P(h);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(D);
- Threat
- QAR1(A),XR(d)
- Vars
- R(d);OGATE,XR(D)::QAR1(A)
- R(d);SBLOCK,XP(F)::R1(D)
- S(k);S_CUTR(b)::S(L)
- P(h);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),P_SPINR(d),S_FLIGHT,XP(F)
- Try
- R(D);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINR(d),XR(D)::QAB1(A),XR(d)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- R(b);XR(D)::QAR1(A),XR(d)
- S(k);XS(L)::QAR1(A),XR(d)
- Q(j);P_PINS(L)::QAR1(A),XR(d)
- S(k);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(D);
- Threat
- QAR1(A),XR(d)
- Vars
- R(d);SBLOCK,XP(F)::R1(D)
- R(d);OGATE::QAR1(A)
- S(k);S_CUTR(b)::S(L)
- P(h);::S(L)
- Refutation
- K(e);N_SPINS(i),P_SPINP(h),S_FLIGHT,XP(F)
- Try
- R(J);CHECK,XS(i)
- Refutation
- S(k);XR(J)
- Try
- Actual
- R(D);XP(h)
- Threat
- QAR1(A),XR(d)
- Vars
- K(e);P-FLIGHT,P_SPINR(d)::QAB1(A),XR(d)
- K(e);N_SPINS(i),OGATEB,S_FLIGHT,XP(F)::B(I)+R(D),DCHECK
- R(d);OGATEB,XP(F)::R(D)
- R(d);OGATE::QAR1(A)
- S(k);N_GUARD::R(D),XS(i)
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).