MESON Chess Problem Database

Problem Display
PID: 99969 (8/p4RN1/K3P2p/2Pk3P/N3p3/4Q3/P7/8 w - - 0 1)

Elekes, Dezso

Magyar Sakkvilag, 1925

8/p4RN1/K3P2p/2Pk3P/N3p3/4Q3/P7/8

#2

9 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qxe4#
    • 1...Ke5
      • 2.Rf5#
    • 1...Kc6
      • 2.Qxe4#
  • Tries
    • 1.Ka5?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6
        • 2.Qxe4#
      • 1...a6!
    • 1.Kb5?
      • threat
        • 2.Rf5#
      • 1...Ke5
        • 2.Rf5#
      • 1...a6+!
    • 1.Sb2?
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
    • 1.Rf1?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
    • 1.Rf2?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
    • 1.Rf4?
      • threat
        • 2.Qxe4#
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
        • 2.Qxe4#
      • 1...Kc6!
    • 1.Rf5+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qxe4#
      • 1...Kc6!
    • 1.Rf6?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
    • 1.Rxa7?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Rb7?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Rc7?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Rd7+?
      • 1...Kc4
        • 2.Rd4#
        • 2.Qd4#
        • 2.Qb3#
        • 2.Qc3#
        • 2.Qxe4#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Re7?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Ke5!
    • 1.Rf8?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
    • 1.Qd2+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc6
        • 2.Qd6#
        • 2.Qd7#
      • 1...Kc4!
    • 1.Qd4+?
      • 1...Kc6
        • 2.Qxe4#
        • 2.Qd6#
        • 2.Qd7#
      • 1...Kxd4!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Qd6#
      • 1...Kc6
        • 2.Qxe4#
        • 2.Qd6#
        • 2.Qd7#
      • 1...exd3!
    • 1.a3?
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Kc4!
    • 1.e7?
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Rf5#
      • 1...Kc6!
  • Keys
    • 1.c6!
      • threat
        • 2.Qc5#
      • 1...Kc4
        • 2.Qxe4#
      • 1...Ke5
        • 2.Qc5#
      • 1...Kxc6
        • 2.Qc5#
      • 1...Kd6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(B),XP(a)
    • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
    • K(b);S_FLIGHT::QAB(B),XP(a)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • P(d);
    • Try
      • K(F);S_FLIGHT
      • Threat
        • R(H)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • P(d);CHECK
    • Try
      • S(C);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);
      • Threat
        • QAB1(B),XP(a)
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);XP(d)
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(H);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • R(H);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(b);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • P(a);XQ(B)
    • Try
      • P(A);
      • Vars
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
        • K(b);S_FLIGHT::QAB(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(G);
      • Vars
        • K(b);S_FLIGHT::QAR2(B),XP(a)
        • K(b);P-FLIGHT,P_SPINP(a)::R1(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • P(D);
    • Threat
      • QAR1(B)
    • Vars
      • K(b);S_FLIGHT::QAR2(B),XP(a)
      • K(b);P-FLIGHT,P_SPINP(a)::QAR2(B)
      • K(b);S_FLIGHT,XP(D)::QAR1(B)
      • K(b);P-FLIGHT::QAB1(B)
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