MESON Chess Problem Database
Problem Display
PID: 236980 (2n3b1/6p1/7b/2p1r2p/4kp1R/Q2Rp1PB/3P4/BN2K1N1 w - - 0 1)
Ellerman, Arnoldo
American Chess Bulletin, 1921
#2
10 + 10
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rd5
- 2.Rxe3#
- 1...Rf5
- 2.Bg2#
- 1...Rg5
- 2.Rxf4#
- 1...Bd5
- 2.Rxe3#
- 1...exd2+
- 2.Sxd2#
- 1...c4
- 2.Rd4#
- 1...Rd5
- Tries
- 1.Rd6?
- threat
- 2.Sc3#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...exd2+
- 2.Sxd2#
- 1...Re6
- 2.Qd3#
- 2.Qxe3#
- 2.Qa8#
- 2.d3#
- 1...Rd5
- 2.Qxe3#
- 1...Rf5
- 2.Bg2#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Rg5
- 2.Rxf4#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re7
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re8
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Bb3
- 2.Sc3#
- 2.d3#
- 1...Bc4
- 2.Sc3#
- 2.Qxe3#
- 1...Bd5
- 2.Qxe3#
- 2.d3#
- 1...e2
- 2.Sc3#
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 1...c4
- 2.Sc3#
- 2.Rd4#
- 2.Qxe3#
- 1...Sxd6!
- threat
- 1.Rd7?
- threat
- 2.Sc3#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...exd2+
- 2.Sxd2#
- 1...Re6
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Rd5
- 2.Qxe3#
- 1...Rf5
- 2.Bg2#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Rg5
- 2.Rxf4#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re7
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re8
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Bb3
- 2.Sc3#
- 2.d3#
- 1...Bc4
- 2.Sc3#
- 2.Qxe3#
- 1...Bd5
- 2.Qxe3#
- 2.d3#
- 1...e2
- 2.Sc3#
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 1...c4
- 2.Sc3#
- 2.Rd4#
- 2.Qxe3#
- 1...Sd6!
- threat
- 1.Rd8?
- threat
- 2.Sc3#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...exd2+
- 2.Sxd2#
- 1...Re6
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Rd5
- 2.Qxe3#
- 1...Rf5
- 2.Bg2#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Rg5
- 2.Rxf4#
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re7
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Re8
- 2.Qd3#
- 2.Qxe3#
- 2.d3#
- 1...Bb3
- 2.Sc3#
- 2.d3#
- 1...Bc4
- 2.Sc3#
- 2.Qxe3#
- 1...Bd5
- 2.Qxe3#
- 2.d3#
- 1...e2
- 2.Sc3#
- 2.Qd3#
- 2.Qe3#
- 2.Qf3#
- 1...c4
- 2.Sc3#
- 2.Rd4#
- 2.Qxe3#
- 1...Sd6!
- threat
- 1.Qb4+?
- 1...Bc4
- 2.Qxc4#
- 1...cxb4
- 2.Rd4#
- 1...c4
- 2.Rd4#
- 1...Kxd3!
- 1...Bc4
- 1.Qb3?
- threat
- 2.Rxe3#
- 1...exd2+
- 2.Sxd2#
- 1...Bc4
- 2.Qxc4#
- 1...e2
- 2.Re3#
- 1...c4
- 2.Rd4#
- 1...Bxb3!
- threat
- 1.Qa4+?
- 1...Bc4
- 2.Qxc4#
- 1...c4
- 2.Rd4#
- 1...Kxd3!
- 1...Bc4
- 1.Qa8+?
- 1...Rd5
- 2.Rxe3#
- 1...Bd5
- 2.Rxe3#
- 1...Kxd3!
- 1...Rd5
- 1.Rd6?
- Keys
- 1.Qa6!
- threat
- 2.Sc3#
- 1...exd2+
- 2.Sxd2#
- 1...Bc4
- 2.Qxc4#
- 1...c4
- 2.Rd4#
- 1...Re6
- 2.Qc4#
- 1...Rd5
- 2.Rxe3#
- 1...Rf5
- 2.Bg2#
- 1...Rg5
- 2.Rxf4#
- 1...Re7
- 2.Qg6#
- 1...Re8
- 2.Qg6#
- threat
- 1.Qa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- R(e);SBLOCK::R1(G),XP(a)
- R(e);SBLOCK::B(I)
- R(e);S_CUTB(g)::R1(J),XP(c)
- B(j);SBLOCK::R1(G),XP(a)
- P(a);CHECK,XP(E)::S(B),XP(a)
- P(d);N_GUARD::R1(G)
- Tries
- Try
- R(G);
- Threat
- DUALS(4)
- Vars
- P(a);CHECK,XP(E)::S(B),XP(a)
- R(e);::QAR1(F),XP(a)
- Refutation
- S(i);XR(G)
- Try
- R(G);
- Threat
- DUALS(4)
- Vars
- P(a);CHECK,XP(E)::S(B),XP(a)
- R(e);::QAR1(F),XP(a)
- Refutation
- S(i);
- Try
- R(G);
- Threat
- DUALS(4)
- Vars
- P(a);CHECK,XP(E)::S(B),XP(a)
- R(e);::QAR1(F),XP(a)
- Refutation
- S(i);
- Try
- Q(F);CHECK
- Vars
- B(j);N_GUARD,P_SPINB(j)::QAR2(F),XB(j)
- P(d);N_GUARD,XQ(F)::R1(G)
- P(d);N_GUARD,N_SPINP(c),P_SPINP(d)::R1(G)
- Refutation
- K(b);N_SPINP(c),S_FLIGHT,XR(G)
- Try
- Q(F);
- Threat
- R1(G),XP(a)
- Vars
- P(a);CHECK,XP(E)::S(B),XP(a)
- B(j);N_GUARD::QAR2(F),XB(j)
- P(a);::R1(G)
- P(d);N_GUARD::R1(G)
- Refutation
- B(j);XQ(F)
- Try
- Q(F);CHECK
- Vars
- B(j);N_GUARD,P_SPINB(j)::QAR2(F),XB(j)
- P(d);N_GUARD,N_SPINP(c),P_SPINP(d)::R1(G)
- Refutation
- K(b);N_SPINP(c),S_FLIGHT,XR(G)
- Try
- Q(F);CHECK
- Vars
- R(e);P_SPINR(e)::R1(G),XP(a)
- B(j);P_SPINB(j)::R1(G),XP(a)
- Refutation
- K(b);N_SPINP(c),S_FLIGHT,XR(G)
- Try
- Actual
- Q(F);
- Threat
- S(B)
- Vars
- P(a);CHECK,XP(E)::S(B),XP(a)
- B(j);N_GUARD::QAR2(F),XB(j)
- P(d);N_GUARD::R1(G)
- R(e);S_CUTB(j)::QAR2(F)
- R(e);SBLOCK::R1(G),XP(a)
- R(e);SBLOCK::B(I)
- R(e);S_CUTB(g)::R1(J),XP(c)
- R(e);N_GUARD::QAB(F)
Developed and maintained by Brian Stephenson.
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CSS/Javascript (jQuery, Bootstrap & DataTables).