MESON Chess Problem Database

Problem Display
PID: 71558 (8/Q7/8/1kp1P3/pBRpP3/R2p4/2pP4/2K5 w - - 0 1)

Ceder, Sven Ture

Jonsson, Gustav

Schackvarlden, 1944

8/Q7/8/1kp1P3/pBRpP3/R2p4/2pP4/2K5

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qxc5#
    • 1...Kc6
      • 2.Rxc5#
    • 1...cxb4
      • 2.Rc5#
  • Tries
    • 1.Bc3?
      • threat
        • 2.Rxc5#
      • 1...Kxc4
        • 2.Qxa4#
        • 2.Qa6#
      • 1...Kc6
        • 2.Rxc5#
      • 1...dxc3!
    • 1.Rxa4?
      • threat
        • 2.Rxc5#
        • 2.Qa6#
      • 1...Kc6
        • 2.Rxc5#
      • 1...cxb4
        • 2.Raxb4#
        • 2.Rc5#
        • 2.Qa6#
      • 1...Kxc4!
    • 1.Rxc2?
      • threat
        • 2.Qb7#
      • 1...Kxb4
        • 2.Qxc5#
        • 2.Qxa4#
      • 1...Kc6
        • 2.Rxc5#
      • 1...cxb4
        • 2.Rc5#
      • 1...dxc2!
    • 1.Rcc3?
      • threat
        • 2.Qb7#
      • 1...Kxb4
        • 2.Qxc5#
        • 2.Qb6#
        • 2.Qxa4#
      • 1...Kc6
        • 2.Rxc5#
      • 1...cxb4
        • 2.Rc5#
      • 1...dxc3!
    • 1.Qb6+?
      • 1...Kxc4
        • 2.Qxc5#
      • 1...Kxb6!
    • 1.Qxa4+?
      • 1...Kxc4
        • 2.Bc3#
        • 2.Ba5#
      • 1...Kb6!
    • 1.Qa5+?
      • 1...Kxc4
        • 2.Qxc5#
      • 1...Kc6!
    • 1.e6?
      • 1...Kxc4
        • 2.Qxc5#
      • 1...cxb4
        • 2.Rc5#
      • 1...Kc6!
  • Keys
    • 1.Ba5!
      • threat
        • 2.Rxc5#
      • 1...Kxc4
        • 2.Qa6#
      • 1...Kc6
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT,XR(E)::QAR1(H),XP(f)
    • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
    • P(f);SBLOCK,XB(D)::R1(E)
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(E),XP(f)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
      • Refutation
        • P(d);XB(D)
    • Try
      • R(C);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
      • Refutation
        • K(e);S_FLIGHT,XR(E)
    • Try
      • R(E);XP(a)
      • Threat
        • QAR2(H)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
        • P(f);SBLOCK,XB(D)::R1(E)
      • Refutation
        • P(b);XR(E)
    • Try
      • R(E);
      • Threat
        • QAR2(H)
      • Vars
        • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
        • P(f);SBLOCK,XB(D)::R1(E)
      • Refutation
        • P(d);XR(E)
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR1(H),XP(f)
      • Refutation
        • K(e);P-FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK,XP(c)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT,XR(E)::QAR1(H),XP(f)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT
    • Try
      • P(G);
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR1(H),XP(f)
        • P(f);SBLOCK,XB(D)::R1(E)
      • Refutation
        • K(e);P_SPINP(f),S_FLIGHT
  • Actual
    • B(D);
    • Threat
      • R1(E),XP(f)
    • Vars
      • K(e);S_FLIGHT,XR(E)::QAB(H)
      • K(e);P_SPINP(f),S_FLIGHT::R1(E),XP(f)
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