MESON Chess Problem Database

Problem Display
PID: 224637 (8/3K4/8/2N1R3/3kp2B/8/1P4P1/Q7 w - - 0 1)

Sieg, Gustav

Deutsche Schachzeitung, 1887

8/3K4/8/2N1R3/3kp2B/8/1P4P1/Q7

#2

7 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qa4#
    • 1...e3
      • 2.b3#
  • Tries
    • 1.Kd6?
      • threat
        • 2.Rxe4#
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Re4#
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Ke6?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Be1?
      • 1...Ke3
        • 2.Rxe4#
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.b3#
      • 1...Kxe5!
    • 1.Bf2+?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.b3#
      • 1...Kxe5!
    • 1.Bg3?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Bg5?
      • threat
        • 2.b3#
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe5!
    • 1.Bf6?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Rxe4+?
      • 1...Kxc5
        • 2.Qa5#
      • 1...Kd5!
    • 1.Rf5?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Rg5?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Rh5?
      • 1...Kc4
        • 2.Qa4#
      • 1...e3
        • 2.Qa4#
        • 2.b3#
      • 1...Ke3!
    • 1.Qd1+?
      • 1...Ke3
        • 2.Rxe4#
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe5!
    • 1.Qe1?
      • threat
        • 2.Qc3#
        • 2.Qxe4#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...e3
        • 2.Qc3#
      • 1...Kc4!
    • 1.Qf1?
      • 1...Ke3
        • 2.Qf2#
      • 1...e3
        • 2.Qf4#
      • 1...Kxe5!
    • 1.Qa3?
      • threat
        • 2.Qc3#
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe5!
    • 1.Qa4+?
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Ke3!
    • 1.Qa8?
      • threat
        • 2.Qxe4#
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...e3
        • 2.Qe4#
        • 2.Qd5#
      • 1...Ke3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qc3#
      • 1...Ke3
        • 2.Rxe4#
      • 1...Kc4
        • 2.Qa4#
      • 1...Kxe5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
    • P(b);::QAB(A)+P(B)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • R1(F),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • K(G);S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • B(D);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);::QAB(A)+P(B)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);P_SPINP(b)::QAB(A)+P(B)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • B(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • B(D);
      • Threat
        • QAB(A)+P(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • B(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • R(F);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT,XS(E)::QAR2(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(F);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT,XR(F)::QAR1(A),XP(b)
        • P(b);::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(A)
        • P(b);OGATEB::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT,XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT,XR(F)::QAR1(A),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • K(a);S_FLIGHT,XR(F)::QAR1(A),XP(b)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::R1(F),XP(b)
      • K(a);P-FLIGHT::QAR2(A)
      • K(a);S_FLIGHT,XR(F)::QAR(A)+S(E)
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